Reproduction And Co-ordination Topics Year 9 Science

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Reproduction Quizzes & Trivia

This quiz is designed to be taken after studying to test how much you have learnt before an exam and to find your weak points. The test directly follows Science outcomes.


Questions and Answers
  • 1. 

    What type of reproduction involves the fusion of gametes to form fertilised egg?

    Explanation
    Sexual reproduction involves the fusion of gametes to form a fertilized egg. This process requires the combination of genetic material from two parent organisms, typically a male and a female, resulting in offspring that inherit traits from both parents. Sexual reproduction promotes genetic diversity and variation within a species, as it allows for the shuffling and recombination of genetic material through processes such as meiosis and fertilization.

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  • 2. 

    What type of reproduction involves multiplication by simple devision?

    Explanation
    Asexual reproduction involves the multiplication of organisms by simple division, where a single parent organism divides into two or more identical offspring. This type of reproduction does not involve the fusion of gametes or the genetic contribution of two parents. Instead, the offspring are genetically identical clones of the parent. Therefore, both "asexual" and "asexual reproduction" are correct answers to the question.

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  • 3. 

    An example of asexual reproduction is?

    Explanation
    Binary fission, budding, and runners are all examples of asexual reproduction. In binary fission, a single organism divides into two identical daughter cells. Budding involves the formation of a small outgrowth on the parent organism, which eventually detaches and becomes a new individual. Runners, also known as stolons, are horizontal stems that grow above the ground and produce new plants at their nodes. These methods of reproduction do not involve the fusion of gametes and result in offspring that are genetically identical to the parent organism.

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  • 4. 

    Miosis is used in multicellular organisms. True or False

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Miosis is a type of cell division that occurs in multicellular organisms. It is responsible for the production of gametes (reproductive cells) such as sperm and eggs. During meiosis, the number of chromosomes in the parent cell is halved, resulting in genetically diverse offspring. This process is essential for sexual reproduction in multicellular organisms, allowing for genetic variation and evolution. Therefore, the statement "miosis is used in multicellular organisms" is true.

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  • 5. 

    Cell devision is used for? check all that apply

    • A.

      Energy

    • B.

      Repair

    • C.

      Movement

    • D.

      Growth

    • E.

      Asexual reproduction

    • F.

      Sexual reproduction

    Correct Answer(s)
    B. Repair
    D. Growth
    E. Asexual reproduction
    F. Sexual reproduction
    Explanation
    Cell division is used for repair, growth, asexual reproduction, and sexual reproduction. Repair involves the replacement of damaged or dead cells with new cells through cell division. Growth occurs as cells divide and increase in number, leading to the growth of tissues and organs. Asexual reproduction involves the production of genetically identical offspring through cell division. Sexual reproduction involves the fusion of two gametes, which are produced through cell division, to form a new individual with genetic variation.

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  • 6. 

    Mitosis is used in asexual reproduction in unicellular organisms?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Mitosis is the process of cell division that occurs in unicellular organisms during asexual reproduction. It allows the organism to produce genetically identical daughter cells, ensuring that the genetic information is passed on accurately. Therefore, mitosis is indeed used in asexual reproduction in unicellular organisms.

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  • 7. 

    What is the muscular tube that is the entry point for sperm from the male?

    • A.

      Cervix

    • B.

      Urethra

    • C.

      Fallopian tube

    • D.

      Vagina

    Correct Answer
    D. Vagina
    Explanation
    The vagina is the correct answer because it is a muscular tube that serves as the entry point for sperm from the male during sexual intercourse. It connects the uterus to the external genitalia and is responsible for receiving the penis during intercourse and allowing the passage of sperm into the reproductive system. The cervix, fallopian tube, and urethra are not the correct answers as they have different functions and are not specifically related to the entry point for sperm from the male.

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  • 8. 

    What is the hollow muscular chamber in which the fertilised ovum grows to become a baby?

    Correct Answer
    uterus
    womb
    Explanation
    The correct answer is uterus. The uterus is a hollow muscular chamber where the fertilized ovum implants and grows into a baby during pregnancy. It provides a nourishing environment for the developing fetus and expands to accommodate its growth. The terms "uterus" and "womb" are often used interchangeably to refer to this reproductive organ in females.

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  • 9. 

    What occurs in the Ovary? click all that apply.

    • A.

      Fertilisation

    • B.

      Eggs mature

    • C.

      Implantation

    • D.

      Progesterone produced

    • E.

      Oestrogen produced

    Correct Answer(s)
    B. Eggs mature
    E. Oestrogen produced
    Explanation
    In the ovary, eggs mature and oestrogen is produced. The ovaries are responsible for the production and release of eggs during the menstrual cycle. As the eggs mature, they prepare for potential fertilization. Additionally, the ovaries produce hormones such as oestrogen, which plays a crucial role in regulating the menstrual cycle and preparing the uterus for potential pregnancy. Therefore, both the maturation of eggs and the production of oestrogen occur in the ovary.

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  • 10. 

    What joins the ovary to the Urethra?

    Correct Answer(s)
    fallopian tube
    fallopian tubes
    Explanation
    The fallopian tube(s) join(s) the ovary to the uterus, not the urethra. The fallopian tube(s) is responsible for transporting the egg from the ovary to the uterus, where fertilization can occur. The urethra, on the other hand, is a separate structure that is part of the urinary system and is responsible for carrying urine from the bladder out of the body.

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  • 11. 

    Which gland produces fluid to help sperm survive journey into the vagina, uterus and fallopian tubes?

    Correct Answer(s)
    prostate
    prostate gland
    Explanation
    The prostate gland produces fluid that helps sperm survive their journey into the vagina, uterus, and fallopian tubes. This fluid, known as prostatic fluid, contains nutrients and enzymes that nourish and protect the sperm, increasing their chances of successfully fertilizing an egg.

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  • 12. 

    Which tube caries urine out of the body?

    Correct Answer(s)
    urethra
    Explanation
    The urethra is the tube that carries urine out of the body. It is a muscular tube that connects the bladder to the external opening of the body. When the bladder is full, the muscles in the urethra relax, allowing urine to flow out of the body. In males, the urethra also carries semen during ejaculation.

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  • 13. 

    What two things are produced in the testis?

    Correct Answer(s)
    sperm and testosterone
    testosterone and sperm
    sperm testosterone
    testosterone sperm
    Explanation
    The testis is responsible for producing both sperm and testosterone. Sperm is the male reproductive cell that is necessary for fertilization, while testosterone is the primary male sex hormone that is responsible for the development of male reproductive tissues and secondary sexual characteristics. Both sperm and testosterone are essential for male reproductive function and fertility.

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  • 14. 

    What carries sperm to the urethra?

    Correct Answer(s)
    vas deferens
    ductus
    Explanation
    The vas deferens, also known as the ductus deferens, carries sperm from the testicles to the urethra. It is a long, muscular tube that connects the epididymis (where sperm mature) to the ejaculatory ducts. During ejaculation, the muscles in the vas deferens contract, propelling the sperm forward into the urethra, where it can then be expelled from the body.

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  • 15. 

    Which part of the sperm contains the nucleus and genetic material?

    • A.

      Head

    • B.

      Mid-piece

    • C.

      Tail

    Correct Answer
    A. Head
    Explanation
    The head of the sperm contains the nucleus and genetic material. The nucleus is responsible for carrying the genetic information, including the DNA, that will be passed on to the offspring. The genetic material in the sperm head combines with the genetic material from the egg during fertilization to create a unique set of genes for the new individual. The mid-piece and tail of the sperm have other important functions, such as providing energy for the sperm to swim towards the egg, but they do not contain the nucleus or genetic material.

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  • 16. 

    What does the mid-piece of the sperm contain?

    Correct Answer
    mitochondria
    energy
    Explanation
    The mid-piece of the sperm contains mitochondria, which are responsible for providing energy to the sperm. These mitochondria produce ATP (adenosine triphosphate), which is the energy currency of the cell. This energy is essential for the sperm to swim and move towards the egg during fertilization. Therefore, the presence of mitochondria in the mid-piece of the sperm is crucial for its function and successful fertilization.

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  • 17. 

    Ovas are large because?

    • A.

      They contain most of the potential baby

    • B.

      They hold all the nutrients

    • C.

      They need to be found easily by sperm

    Correct Answer
    B. They hold all the nutrients
    Explanation
    Ovaries are large because they hold all the nutrients needed for the potential baby. The ovaries play a crucial role in reproduction by producing and releasing eggs, which contain all the necessary nutrients for the development of a fetus. These nutrients are essential for the survival and growth of the potential baby. Therefore, the large size of ovaries ensures that they can accommodate and provide the required nutrients for the development of a healthy fetus.

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  • 18. 

    Fertilisation is when the s____ and eggs n_______ combine.

    Correct Answer
    sperm nucleus
    sperm and eggs nucleus
    perm ucleas
    Explanation
    The correct answer is "sperm nucleus, sperm and eggs nucleus." Fertilization is the process in which the nucleus of a sperm cell fuses with the nucleus of an egg cell, resulting in the combination of genetic material from both parents. The sperm nucleus contains the genetic material from the father, while the eggs nucleus contains the genetic material from the mother. The fusion of these nuclei is essential for the formation of a new individual with a unique combination of genetic traits.

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  • 19. 

    Where does the fertilised egg implant?

    Correct Answer
    uterus
    womb
    Explanation
    The fertilized egg implants in the uterus or womb. After fertilization, the egg travels down the fallopian tube and reaches the uterus where it attaches itself to the uterine lining. This is where the embryo will develop and receive nourishment throughout pregnancy. The terms "uterus" and "womb" are used interchangeably to refer to the same reproductive organ in females where implantation occurs.

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  • 20. 

    Where does the egg go if it is not fertilised?

    Correct Answer
    vagina
    out the vagina
    Explanation
    The correct answer is "vagina, out the vagina." If an egg is not fertilized, it will travel through the fallopian tubes and into the uterus. From there, it will be expelled out of the body through the vagina during menstruation.

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  • 21. 

    What is the plate like structure joined to the foetus by the umbilical cord called?

    Correct Answer
    placenta
    Explanation
    The plate-like structure joined to the fetus by the umbilical cord is called the placenta. The placenta is an organ that develops during pregnancy and serves as a connection between the mother and the developing fetus. It provides oxygen and nutrients to the fetus, removes waste products, and helps in hormone production. The placenta plays a crucial role in the growth and development of the fetus throughout pregnancy.

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  • 22. 

    What diffuses into the foetus blood from the mothers blood? check all that apply

    • A.

      Food

    • B.

      Carbon dioxide

    • C.

      Oxygen

    • D.

      Waste products

    Correct Answer(s)
    A. Food
    C. Oxygen
    Explanation
    During pregnancy, the foetus receives essential nutrients and oxygen from the mother's blood through the placenta. These substances diffuse from the mother's blood vessels into the foetus' blood vessels in the placenta. Oxygen is necessary for the foetus' respiration, while food (nutrients) provides energy and nourishment for its growth and development. Therefore, both food and oxygen diffuse into the foetal blood from the mother's blood.

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  • 23. 

    What parts of the body are involved in a womans period? 

    • A.

      Brain

    • B.

      Stomach

    • C.

      Pituitary gland

    • D.

      Heart

    • E.

      Uterus

    • F.

      Cervix

    • G.

      Urethra

    • H.

      Bladder

    • I.

      Ovaries

    • J.

      Adrenaline gland

    • K.

      Fallopian tubes

    • L.

      Anus

    • M.

      Vagina

    Correct Answer(s)
    A. Brain
    C. Pituitary gland
    E. Uterus
    F. Cervix
    I. Ovaries
    K. Fallopian tubes
    M. Vagina
  • 24. 

    Oestrogen

    • A.

      Stimulates uterus to build up its lining

    • B.

      Its decrease leads to bleeding

    • C.

      During implantation it lovers maternal immune system

    Correct Answer
    A. Stimulates uterus to build up its lining
    Explanation
    Oestrogen is a hormone that plays a crucial role in the menstrual cycle. It stimulates the uterus to build up its lining, known as the endometrium, in preparation for a potential pregnancy. This lining provides a nourishing environment for a fertilized egg to implant and develop. If fertilization does not occur, the decrease in oestrogen levels triggers the shedding of the uterine lining, resulting in menstrual bleeding. This process occurs in each menstrual cycle unless pregnancy occurs.

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  • 25. 

    Which one correctly shows the order of a babies life cycle

    • A.

      Fertilisation, blastocyst, zygote, gamete, embryo, fetus

    • B.

      Gamete, fertilisation, bastocyst, zygote, embryo, fetus

    • C.

      Gamete, fertilisation, embryo, zygote, blastocyst, fetus

    • D.

      Gamete, fertilisation, zygote, blastocyst, embryo, fetus

    Correct Answer
    D. Gamete, fertilisation, zygote, blastocyst, embryo, fetus
    Explanation
    The correct answer is "gamete, fertilisation, zygote, blastocyst, embryo, fetus". This sequence accurately represents the order of a baby's life cycle. The process begins with the formation of gametes (sperm and egg), followed by fertilization when the sperm and egg fuse to form a zygote. The zygote then undergoes cell division and forms a blastocyst, which implants itself into the uterus. The blastocyst develops into an embryo, which eventually develops into a fetus.

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  • 26. 

    What happens when the baby is a zygote?

    • A.

      Attaches to the lining of uterus

    • B.

      Cells divide repeatedly

    • C.

      Baby is developing internal organs

    Correct Answer
    B. Cells divide repeatedly
    Explanation
    When the baby is a zygote, it undergoes a process called cell division, where the single cell divides repeatedly. This division leads to the formation of more cells, which eventually develop into the various tissues and organs of the developing baby. The zygote attaches to the lining of the uterus after fertilization, but this is not specifically mentioned in the answer. Similarly, the development of internal organs is a subsequent stage in the baby's growth and is not directly related to the zygote stage.

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  • 27. 

    What happens in a babies Blastocyst stage?

    • A.

      Attaches to the lining of uterus

    • B.

      Develops under uterus

    • C.

      Outer cells burrow into wall and become placenta

    • D.

      Develops internal structures

    • E.

      Inner cells develop to become embryo

    Correct Answer(s)
    A. Attaches to the lining of uterus
    C. Outer cells burrow into wall and become placenta
    E. Inner cells develop to become embryo
    Explanation
    During the Blastocyst stage, the embryo attaches to the lining of the uterus. The outer cells of the blastocyst then burrow into the uterine wall and form the placenta. Meanwhile, the inner cells of the blastocyst develop and differentiate to become the embryo.

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  • 28. 

    During the babies embryo stage the baby develops under the lining of uterus and develops most of its internal and external structures

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    During the embryo stage, the baby develops inside the lining of the uterus and forms its internal and external structures. This is a crucial period of development where major organs and body systems are formed. Therefore, the statement "During the babies embryo stage the baby develops under the lining of uterus and develops most of its internal and external structures" is true.

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  • 29. 

    Mitosis does not effect chromosome number in final cell. true or false?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Mitosis is a type of cell division that results in two daughter cells with the same chromosome number as the parent cell. During mitosis, the chromosomes replicate and then separate into two identical sets, ensuring that each daughter cell receives the same number of chromosomes as the parent cell. Therefore, the statement that mitosis does not affect the chromosome number in the final cell is true.

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  • 30. 

    In mitosis DNA doubles and divides by four

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    In mitosis, DNA does not double and divide by four. Instead, the DNA replicates and divides into two identical sets of chromosomes. Each set of chromosomes then moves to opposite ends of the cell, resulting in the formation of two identical daughter cells with the same number of chromosomes as the parent cell. Therefore, the statement that DNA doubles and divides by four in mitosis is incorrect.

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  • 31. 

    In miosis

    • A.

      The diploid cell doubles and divides into four haploid cells

    • B.

      The haploid cell doubles and divides into four diploid cells

    • C.

      The diploid cell doubles and divides into two haploid cells

    Correct Answer
    A. The diploid cell doubles and divides into four haploid cells
    Explanation
    In meiosis, the diploid cell undergoes a process where it first duplicates its genetic material, resulting in two copies of each chromosome. Then, it divides into two cells, each containing one copy of each chromosome. These cells then undergo a second division, resulting in four haploid cells, with each cell containing only one copy of each chromosome. This process is important for the production of gametes (sperm and eggs) in sexual reproduction.

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  • 32. 

    How many chromosomes in a diploid cell?

    Correct Answer
    46
    Explanation
    In a diploid cell, there are 46 chromosomes. A diploid cell contains two sets of chromosomes, one set inherited from each parent. Each set consists of 23 chromosomes, resulting in a total of 46 chromosomes in a diploid cell. This is the typical chromosome count in human cells, with the exception of gametes (sperm and egg cells) which are haploid and contain only 23 chromosomes.

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  • 33. 

    How many chromosomes in a haploid cell

    Correct Answer
    23
    Explanation
    A haploid cell contains half the number of chromosomes compared to a diploid cell. In humans, a diploid cell has 46 chromosomes, so a haploid cell would have half of that, which is 23 chromosomes. This is because during meiosis, the process of cell division that produces gametes (sperm and egg cells), the chromosome number is halved to ensure that when fertilization occurs, the resulting zygote has the correct number of chromosomes.

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  • 34. 

    Name 4 advantages of Biotechnology

  • 35. 

    What does the thyroid gland do?

    • A.

      Controls growth and development

    • B.

      Controls sleeping and waking patterns

    • C.

      Regulates cell growth and activity

    Correct Answer
    C. Regulates cell growth and activity
    Explanation
    The thyroid gland is responsible for regulating cell growth and activity. It produces hormones that control metabolism and influence the function of almost every organ in the body. These hormones help to regulate the rate at which cells convert food into energy, and they also play a role in the growth and development of tissues. Therefore, the correct answer is that the thyroid gland regulates cell growth and activity.

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  • 36. 

    What does the hypothalamus gland do? check all that apply

    • A.

      Controls growth and development

    • B.

      Controls reflex actions

    • C.

      Controls breathing

    • D.

      Controls water balance

    • E.

      Controls body temperature

    • F.

      Controls heart beat

    • G.

      Regulates glucose levels

    • H.

      Regulates cell growth

    • I.

      Controls hunger and thirst

    • J.

      Increases blood and heart rate

    • K.

      Controls sex drive

    • L.

      Controls emotions

    Correct Answer(s)
    B. Controls reflex actions
    C. Controls breathing
    E. Controls body temperature
    F. Controls heart beat
    I. Controls hunger and thirst
    K. Controls sex drive
    L. Controls emotions
    Explanation
    The hypothalamus gland controls reflex actions by coordinating involuntary responses to stimuli. It controls breathing by regulating the respiratory center in the brainstem. It controls body temperature by regulating the hypothalamic-pituitary-thyroid axis. It controls heart beat by influencing the autonomic nervous system. It controls hunger and thirst by regulating appetite and fluid balance. It controls sex drive by influencing the release of reproductive hormones. It controls emotions by regulating the limbic system in the brain.

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  • 37. 

    The pancreas 

    • A.

      Regulates cell growth and activity

    • B.

      Regulates glucose levels in blood

    • C.

      Stimulates the release of breast milk

    Correct Answer
    B. Regulates glucose levels in blood
    Explanation
    The pancreas is an organ that plays a crucial role in regulating glucose levels in the blood. It produces and releases insulin, a hormone that helps to control the amount of sugar in the bloodstream. Insulin allows cells to take in glucose from the blood, which is then used for energy or stored for later use. When blood sugar levels are too high, the pancreas releases more insulin to lower them. Conversely, when blood sugar levels are too low, the pancreas releases glucagon, another hormone that helps to raise blood sugar levels. Overall, the pancreas helps to maintain the balance of glucose in the bloodstream.

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  • 38. 

    What does the pituitary gland do?  check all that apply

    • A.

      Controls growth and development

    • B.

      Controls heart rate

    • C.

      Controls water balance

    • D.

      Controls contractions during child birth

    • E.

      Regulates cell growth and activity

    • F.

      Stimulates the release of breast milk

    Correct Answer(s)
    A. Controls growth and development
    C. Controls water balance
    D. Controls contractions during child birth
    F. Stimulates the release of breast milk
    Explanation
    The pituitary gland is a small gland located at the base of the brain. It plays a crucial role in regulating various bodily functions. It controls growth and development by releasing growth hormone, which stimulates the growth of bones, muscles, and other tissues. The pituitary gland also controls water balance by releasing antidiuretic hormone (ADH), which regulates the amount of water reabsorbed by the kidneys. During childbirth, the pituitary gland releases oxytocin, which stimulates contractions of the uterus. Additionally, the pituitary gland stimulates the release of breast milk by producing prolactin, a hormone that triggers milk production in the mammary glands.

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  • 39. 

    Name an example of a physical barrier to sperm

    Correct Answer(s)
    condom
    diaphragm
    Explanation
    A condom and diaphragm are both examples of physical barriers to sperm. These devices physically block the sperm from entering the cervix and reaching the egg, thus preventing fertilization.

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  • 40. 

    Name a chemical barrier to ovalation

    Correct Answer(s)
    the pill
    pill
    injections
    implant
    implants
    Explanation
    The given options - the pill, pill, injections, implant, and implants - all refer to different forms of hormonal contraception. These methods work by releasing synthetic hormones into the body, which can prevent ovulation. The pill is a daily oral contraceptive, while injections and implants are long-acting methods that release hormones over a prolonged period. These hormonal contraceptives create a chemical barrier to ovulation, inhibiting the release of an egg from the ovaries and therefore preventing pregnancy.

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  • 41. 

    The mini pill only contains progesterone. True or false

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The mini pill, also known as the progestin-only pill, indeed only contains progesterone. It is a form of birth control pill that does not contain estrogen, making it a suitable option for women who cannot or prefer not to take estrogen-based contraceptives. Progesterone-only pills work by thickening the cervical mucus, thinning the lining of the uterus, and sometimes by suppressing ovulation. Therefore, the statement "The mini pill only contains progesterone" is true.

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  • 42. 

    How does the pill trick the body into thinking it is pregnant?

    • A.

      Progesterone and oestrogen levels are high

    • B.

      Progesterone and oestrogen levels are low

    • C.

      Progesterone is non existent

    Correct Answer
    B. Progesterone and oestrogen levels are low
    Explanation
    The correct answer is "progesterone and estrogen levels are low." When a woman is pregnant, her body produces high levels of progesterone and estrogen to maintain the pregnancy. However, when taking a contraceptive pill, the hormones in the pill suppress the body's natural production of progesterone and estrogen, tricking the body into thinking it is not pregnant. This prevents ovulation and the release of an egg, thus preventing pregnancy.

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  • 43. 

    Central nervous system includes (check all that apply)

    • A.

      Brain

    • B.

      Cells

    • C.

      Spinal cord

    Correct Answer(s)
    A. Brain
    C. Spinal cord
    Explanation
    The central nervous system includes the brain and spinal cord. These two components are responsible for coordinating and controlling the body's activities. The brain is the command center of the nervous system, receiving and processing information from the senses and sending out signals to the rest of the body. The spinal cord acts as a pathway for communication between the brain and the rest of the body, transmitting signals to and from the brain. Together, the brain and spinal cord play a crucial role in regulating bodily functions and maintaining homeostasis.

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  • 44. 

    Peripheral Nervous system includes (check all that apply)

    • A.

      Brain

    • B.

      Nerve fibres

    • C.

      Spinal nerves

    • D.

      Nerves to all parts of the body

    Correct Answer(s)
    C. Spinal nerves
    D. Nerves to all parts of the body
    Explanation
    The peripheral nervous system includes spinal nerves and nerves to all parts of the body. The brain is part of the central nervous system, not the peripheral nervous system. Nerve fibers are also included in the peripheral nervous system, as they transmit signals between the central nervous system and the rest of the body.

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  • 45. 

    What is the gap between neurones called?

    Correct Answer(s)
    synapse
    Explanation
    The gap between neurons is called a synapse. A synapse is a small junction or gap between two neurons where information is transmitted from one neuron to another. It is an essential part of the communication process in the nervous system, allowing signals to pass from one neuron to the next.

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  • 46. 

    The motor neurones 

    • A.

      Cause movement in the muscle

    • B.

      Send messages to the brain

    Correct Answer
    A. Cause movement in the muscle
    Explanation
    Motor neurons are specialized nerve cells that transmit signals from the brain and spinal cord to the muscles, causing them to contract and produce movement. These neurons play a crucial role in the coordination and control of voluntary movements. When the motor neurons fire, they stimulate the muscle fibers to contract, resulting in movement. Therefore, the statement "cause movement in the muscle" accurately describes the function of motor neurons.

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  • 47. 

    Which of these describes the nervous system. check all that apply

    • A.

      Electric messages

    • B.

      Chemical messages

    • C.

      Carried through blood

    • D.

      Carried along nerve fibres

    • E.

      Fast

    • F.

      Slow

    • G.

      Short lasting

    • H.

      Long lasting

    • I.

      Carries out co-ordination

    Correct Answer(s)
    A. Electric messages
    D. Carried along nerve fibres
    E. Fast
    G. Short lasting
    I. Carries out co-ordination
    Explanation
    The nervous system is responsible for transmitting signals throughout the body. It uses electric messages to send information along nerve fibers, allowing for fast communication. These messages are short-lasting, meaning they do not persist for a long time. Additionally, the nervous system plays a crucial role in coordinating different bodily functions, making it responsible for carrying out coordination.

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  • 48. 

    What are the three types of nerves (do not include any punctuation or the word nerve)

    Correct Answer(s)
    motor sensory mixed
    sensory mixed motor
    sensory motor mixed
    motor mixed sensory
    mixed sensory motor
    Explanation
    The three types of nerves are motor, sensory, and mixed. Motor nerves control the movement of muscles and organs. Sensory nerves transmit information from the senses to the brain. Mixed nerves contain both motor and sensory fibers.

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  • 49. 

    Sensory nerve fibres are dendrons. true or false

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Sensory nerve fibers are indeed dendrons. Dendrons are a type of nerve fiber that carries sensory information from the peripheral nervous system to the central nervous system. These fibers are responsible for transmitting sensory signals such as touch, pain, temperature, and proprioception from sensory receptors to the brain. Therefore, the statement "sensory nerve fibers are dendrons" is true.

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  • 50. 

    Motor nerve fibers conduct impulses towards the centre  nervous system. true or false

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    motor nerves conduct impulses from the cns to the muscles or glands
    sensory nerves conduct messages from sensory receptors to cns

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