Biology : Reproduction Quiz
College freshman level reproduction quiz for biology
Questions and Answers
- 1.
The two hormones of birth control would be ___________.
- A.
Testosterone and estrogen
- B.
Testosterone and progesterone
- C.
Progesterone and FSH
- D.
Estrogen and progesterone
- E.
FSH and LH
Correct Answer
D. Estrogen and progesteroneExplanation
The correct answer is estrogen and progesterone. These two hormones are commonly used in birth control methods such as the combination pill, the patch, and the vaginal ring. Estrogen helps to prevent ovulation, while progesterone thickens the cervical mucus and thins the lining of the uterus, making it difficult for sperm to reach the egg and for a fertilized egg to implant. Together, these hormones provide effective contraception.Rate this question:
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- 2.
After about 4 months into pregnancy the placenta begins to produce __________.
- A.
Human chorionic gonadotropin
- B.
LH
- C.
Progesterone
- D.
LTH
- E.
Estrogen
Correct Answer
C. ProgesteroneExplanation
During pregnancy, the placenta plays a crucial role in supporting the growth and development of the fetus. After about 4 months into pregnancy, the placenta begins to produce progesterone. Progesterone is a hormone that is essential for maintaining pregnancy. It helps in thickening the uterine lining, preventing contractions, and suppressing the mother's immune response to prevent rejection of the fetus. Additionally, progesterone also helps in the development of the mammary glands in preparation for breastfeeding. Therefore, the production of progesterone by the placenta is vital for a healthy pregnancy.Rate this question:
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- 3.
Castration or removal of the testes BEFORE puberty will interfere with development of secondary sex characteristics in males such as ____________.
- A.
Voice
- B.
Muscle mass
- C.
Hairyness
Correct Answer
A. VoiceExplanation
Castration or removal of the testes before puberty will interfere with the development of secondary sex characteristics in males such as voice. During puberty, the larynx (voice box) undergoes growth and the vocal cords lengthen and thicken, resulting in a deeper voice. Testosterone, which is produced by the testes, plays a crucial role in this process. Without testes, the levels of testosterone are significantly reduced, leading to a lack of vocal cord growth and a higher-pitched voice.Rate this question:
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- 4.
The pituitary gland of both males and females produced FSH and LH, but the cell receptors are different.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The pituitary gland is responsible for producing follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in both males and females. However, the cell receptors for these hormones are different between males and females. This means that even though the pituitary gland produces FSH and LH in both genders, the way these hormones interact with cells and tissues differs. Therefore, the statement that the cell receptors are different is true.Rate this question:
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- 5.
In controlling "male/bull" fertility, the urethra is ligated/ cut to stop sperm from leaving the testes.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is incorrect. In controlling male/bull fertility, the vas deferens is typically ligated or cut, not the urethra. The vas deferens is the tube that carries sperm from the testes to the urethra, and by cutting or ligating it, the passage of sperm is blocked, preventing fertilization. The urethra, on the other hand, is the tube that carries urine and semen out of the body, and it is not involved in controlling fertility.Rate this question:
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- 6.
Follicles in the ovary rupture to release the egg on/or about ________ days into the cycle.
- A.
5
- B.
10
- C.
15
- D.
20
Correct Answer
C. 15Explanation
Follicles in the ovary rupture to release the egg on or about 15 days into the cycle. This is because during the menstrual cycle, the follicles in the ovary mature and develop until one dominant follicle releases an egg. This process is known as ovulation and typically occurs around day 14-15 of a 28-day menstrual cycle.Rate this question:
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- 7.
The fertilized egg develops to term (to birth) in the ______.
- A.
Oviduct
- B.
Vagina
- C.
Ovary
- D.
Uterus
Correct Answer
D. UterusExplanation
The correct answer is uterus. The uterus is the organ in the female reproductive system where the fertilized egg implants and develops into a fetus. It provides a suitable environment for the embryo to grow and receive nutrients until it is ready for birth. The oviduct is where fertilization occurs, the vagina is the birth canal, and the ovary is responsible for producing eggs.Rate this question:
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- 8.
The characteristic/ gene that causes maleness is located on the __________.
- A.
An autosome
- B.
"y" chromosome
- C.
"X" chromosome
- D.
Ribosomes
Correct Answer
B. "y" chromosomeExplanation
The characteristic/gene that causes maleness is located on the "y" chromosome. The "y" chromosome is one of the two sex chromosomes, with the other being the "X" chromosome. In mammals, including humans, males have one "X" and one "y" chromosome, while females have two "X" chromosomes. The "y" chromosome contains genes that are responsible for the development of male characteristics and reproductive organs. Therefore, the presence of the "y" chromosome determines the maleness of an individual.Rate this question:
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- 9.
The tip of the clitoris which has lots of touch responding sensory neurons like its homolog, the penis, would be called the ___________.
- A.
Corpora spongiosum
- B.
Prostate
- C.
Cowper's gland
- D.
Glans clitoris
Correct Answer
D. Glans clitorisExplanation
The tip of the clitoris, similar to the penis, is called the glans clitoris. The glans clitoris is highly sensitive and contains numerous touch-responsive sensory neurons, making it an important part of sexual pleasure and arousal in individuals with clitorises.Rate this question:
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- 10.
More than one sperm is required to fertilize an egg because the __________ surrounding the egg must be separated.
- A.
Myometrial cells
- B.
Fuctionalis cells
- C.
Endometrial cells
- D.
Follicle cells
- E.
Serosal cells
Correct Answer
D. Follicle cellsExplanation
Follicle cells are the cells that surround and protect the developing egg in the ovary. These cells play a crucial role in the process of fertilization. More than one sperm is required to fertilize an egg because the follicle cells need to be separated in order for a single sperm to penetrate and fertilize the egg. This separation allows the sperm to reach the egg and initiate the process of fertilization.Rate this question:
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- 11.
Seminal fluid, excluding sperm, is produced by all EXCEPT
- A.
Cowper's gland
- B.
Prostate
- C.
Seminal vesicle
- D.
Vas deferns.
Correct Answer
D. Vas deferns.Explanation
The vas deferens is not responsible for producing seminal fluid. It is a part of the male reproductive system that transports sperm from the epididymis to the ejaculatory ducts. Seminal fluid, which is the majority of the ejaculate, is produced by the Cowper's gland, prostate, and seminal vesicle. These glands contribute to the composition of seminal fluid by secreting various fluids that nourish and protect the sperm.Rate this question:
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- 12.
Approximately how many sperm probably actually reach the egg for fertilization?
- A.
100 million
- B.
20 million
- C.
Hundreds of thousands
- D.
Several hundreds
Correct Answer
D. Several hundredsExplanation
Several hundreds of sperm probably actually reach the egg for fertilization. This is because during ejaculation, millions of sperm are released into the vagina, but only a small percentage of them are able to reach the egg. The journey from the vagina to the egg is long and challenging for sperm, as they have to navigate through the cervix, uterus, and fallopian tubes. Along the way, many sperm get lost or die. By the time the sperm reach the egg, only several hundreds are left to compete for fertilization.Rate this question:
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- 13.
Which hormone stimulates uterine smooth muscle activity and causes milk release from mammary glands during sucking?
- A.
LH
- B.
FSH
- C.
Prolactin
- D.
Oxytocin
Correct Answer
D. OxytocinExplanation
Oxytocin is the correct answer because it is a hormone that stimulates uterine smooth muscle activity, leading to contractions during labor and childbirth. It also plays a crucial role in causing milk release from the mammary glands during breastfeeding, as it promotes the contraction of the muscles surrounding the milk ducts. LH (luteinizing hormone) and FSH (follicle-stimulating hormone) are involved in the regulation of the reproductive system, while prolactin is responsible for milk production but not milk release.Rate this question:
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- 14.
The sugar fructose in the seminal fluid provides the sperm nutrition, while pH buffers protect the sperm from acids.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Fructose in the seminal fluid serves as a source of nutrition for the sperm, providing them with energy for their journey. Additionally, pH buffers in the seminal fluid help to protect the sperm from the acidic environment of the vagina, ensuring their survival and ability to fertilize an egg. Therefore, the statement is true.Rate this question:
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- 15.
The labia major and minor of females are derived from the same tissue as the supporting tissue of the scrotal sac and penis of males.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The labia major and minor of females are derived from the same tissue as the supporting tissue of the scrotal sac and penis of males. This is because during fetal development, both males and females have a common set of structures called the genital tubercle and urogenital folds. In males, these structures develop into the scrotum and penis, while in females, they develop into the labia majora and labia minora. Therefore, it is true that the labia major and minor of females are derived from the same tissue as the supporting tissue of the scrotal sac and penis of males.Rate this question:
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- 16.
The hormone progesterone inhibits production of __________?
- A.
Estrogen and FSH
- B.
LH and FSH
- C.
LH and oxytocin
- D.
Oxytocin and inhibin
- E.
Inhibin and LH
Correct Answer
B. LH and FSHExplanation
Progesterone is a hormone that is primarily involved in the regulation of the female reproductive system. It plays a key role in preparing the uterus for pregnancy and maintaining pregnancy. One of the ways progesterone achieves this is by inhibiting the production of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). LH and FSH are both involved in the regulation of the menstrual cycle and the development and release of eggs from the ovaries. By inhibiting their production, progesterone helps to regulate the menstrual cycle and prevent the release of eggs when pregnancy is desired.Rate this question:
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- 17.
Initiation of both egg and sperm production is controlled by ___________, whereas testosterone production by the interstitial cells of Leydig is controlled by ___________.
- A.
Proesterone, estrogen
- B.
LH , FSH
- C.
FSH , LH
- D.
LH, oxytocin
- E.
Oxytocin, inhibin
Correct Answer
C. FSH , LHExplanation
The initiation of both egg and sperm production is controlled by follicle-stimulating hormone (FSH), which stimulates the development of ovarian follicles in females and the production of sperm in males. Testosterone production by the interstitial cells of Leydig is controlled by luteinizing hormone (LH), which stimulates the interstitial cells to produce testosterone.Rate this question:
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- 18.
The egg must be fertilized in the upper 1/3 of the oviduct because the egg only lives about 24 hours after ovulation.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The explanation for the given correct answer is that the egg only has a lifespan of about 24 hours after ovulation. Therefore, for fertilization to occur, it must happen within this limited time frame. The upper 1/3 of the oviduct is the region where fertilization typically takes place, as it provides the necessary environment and conditions for the sperm to meet and fertilize the egg before it deteriorates.Rate this question:
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- 19.
Sperm are no longer ejected after a vasectomy because the __________ is cut or ligated.
- A.
Epididymis
- B.
Urethra
- C.
Ureter
- D.
Vas deferens
Correct Answer
D. Vas deferensExplanation
After a vasectomy, sperm are no longer ejected because the vas deferens is cut or ligated. The vas deferens is the tube that carries sperm from the testicles to the urethra for ejaculation. By cutting or ligating the vas deferens during a vasectomy, the pathway for sperm to be ejaculated is blocked, preventing them from being released during ejaculation.Rate this question:
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- 20.
Sperm is produced by the seminiferous tubules of the testes, while eggs are produced by the germinal epithelium of the ovaries.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Sperm is indeed produced by the seminiferous tubules of the testes, and eggs are produced by the germinal epithelium of the ovaries. This is a factual statement about the reproductive system in humans. Sperm and eggs are the reproductive cells necessary for sexual reproduction, and they are produced in separate organs within the male and female reproductive systems. Therefore, the answer "true" is correct.Rate this question:
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- 21.
Both the clitoris and penis become erect because of ___________
- A.
The bone hardens
- B.
Penile vein dilates
- C.
Blood pressure
Correct Answer
C. Blood pressureExplanation
Both the clitoris and penis become erect due to increased blood pressure. During sexual arousal, the blood vessels in these organs dilate, allowing more blood to flow into them. This increased blood flow causes the clitoris and penis to become engorged and erect. The pressure from the blood within the vessels contributes to the firmness and rigidity of the organs during sexual stimulation.Rate this question:
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- 22.
By filling with blood, which tissues plays a major role in penile erection?
- A.
Corpora cavernosa
- B.
Corpora spongiosum
- C.
Prostate
- D.
Cowper's gland
- E.
Both a and b
Correct Answer
E. Both a and bExplanation
Both the corpora cavernosa and corpora spongiosum play a major role in penile erection. The corpora cavernosa are two cylindrical tissues that run along the length of the penis and are responsible for the majority of the erectile response. They fill with blood during arousal, causing the penis to become erect. The corpora spongiosum is another erectile tissue that surrounds the urethra and helps maintain the rigidity of the penis during erection. Together, these two tissues facilitate the process of penile erection. The prostate and Cowper's gland are not directly involved in penile erection.Rate this question:
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- 23.
The femal hormone that influences female secondary characters (higher voice , less hairiness, less muscular), female behavior, and guides femal development in the fetus would be ___________.
- A.
Estrogen
- B.
Progesterone
- C.
Testosterone
Correct Answer
A. EstrogenExplanation
Estrogen is the correct answer because it is the female hormone that plays a crucial role in influencing female secondary characteristics such as a higher voice, less hairiness, and less muscular physique. It also affects female behavior and guides the development of female reproductive organs in the fetus. Progesterone is another female hormone, but it primarily regulates the menstrual cycle and pregnancy. Testosterone, on the other hand, is the primary male hormone and is responsible for male secondary characteristics.Rate this question:
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- 24.
The so called abortion pill, RU-486,blocks the action of _____.
- A.
Estrogen
- B.
Progesterone
- C.
Testosterone
- D.
LH
- E.
FSH
Correct Answer
B. ProgesteroneExplanation
RU-486, also known as the abortion pill, blocks the action of progesterone. Progesterone is a hormone that plays a crucial role in maintaining pregnancy by preparing the uterus for implantation and supporting the development of the embryo. By blocking progesterone, RU-486 causes the lining of the uterus to break down, preventing the embryo from implanting and leading to the termination of pregnancy.Rate this question:
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- 25.
In females the urogenital opening and canal of the developing fetus becomes the _______ and ________.
- A.
Urethra, vagina
- B.
Urter, urethra
- C.
Vagina, seminiferous tubules
- D.
Vagina, oviduct
Correct Answer
A. Urethra, vaginaExplanation
During fetal development in females, the urogenital opening and canal differentiate into the urethra and vagina. The urethra is responsible for the elimination of urine from the body, while the vagina serves as the birth canal and also plays a role in sexual intercourse and menstruation.Rate this question:
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- 26.
The menstrual cycle begins when which hormone starts being produced again?
- A.
LH
- B.
Estrogen
- C.
Progesterone
- D.
FSH
- E.
Testosterone
Correct Answer
D. FSHExplanation
The menstrual cycle begins when follicle-stimulating hormone (FSH) starts being produced again. FSH is responsible for stimulating the growth and development of follicles in the ovaries. As the follicles mature, they release estrogen, which triggers the thickening of the uterine lining. This eventually leads to ovulation and the release of an egg. After ovulation, the remaining follicle transforms into the corpus luteum, which produces progesterone. Progesterone helps prepare the uterus for implantation of a fertilized egg. Therefore, while LH, estrogen, progesterone, and testosterone all play important roles in the menstrual cycle, it is FSH that initiates the cycle by stimulating follicle development.Rate this question:
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- 27.
In a day it takes about how long for an ovum or egg to travel down the oviduct
- A.
1-2
- B.
2-3
- C.
3-4
- D.
4-6
- E.
0-1
Correct Answer
C. 3-4Explanation
It takes about 3-4 days for an ovum or egg to travel down the oviduct. The oviduct is the tube through which the egg travels from the ovary to the uterus. During this time, the egg may be fertilized by sperm if sexual intercourse occurs. If fertilization does not occur, the egg will disintegrate and be shed during menstruation.Rate this question:
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- 28.
The endometrium or lining of the uterus prepares for pregnancy each moth by becoming more cellular and vascular under the influence of which two hormones
- A.
LH
- B.
Estrogen
- C.
Progesterone
- D.
Both b and c
- E.
Both a and c
Correct Answer
D. Both b and cExplanation
The endometrium or lining of the uterus prepares for pregnancy each month by becoming more cellular and vascular under the influence of estrogen and progesterone. Estrogen promotes the growth and proliferation of the endometrial cells, while progesterone helps to further develop the blood vessels in the endometrium. Both hormones work together to create a suitable environment for implantation and support the growth of the embryo.Rate this question:
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- 29.
The tip of the penis which has lots of touch responding sensory neurons like its homolog the clitoris would be an extension of the
- A.
Corpora cavenosa
- B.
Copora spongiosum
- C.
Endometruim
- D.
Fuctionalis layer
- E.
Myometrium
Correct Answer
B. Copora spongiosumExplanation
The correct answer is copora spongiosum. The copora spongiosum is a spongy tissue in the penis that surrounds the urethra. It contains many touch-responsive sensory neurons, making it highly sensitive to touch and stimulation. This sensitivity is similar to the clitoris, which also has a high density of sensory neurons.Rate this question:
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- 30.
Sperm are stored mostly in
- A.
Cowpers gland
- B.
Prostate
- C.
Seminal vesicle
- D.
Testes
Correct Answer
C. Seminal vesicleExplanation
The correct answer is seminal vesicle. The seminal vesicles are responsible for storing and producing a significant portion of the fluid that makes up semen. This fluid contains nutrients and substances that help nourish and protect the sperm. While the testes produce and store the sperm, the seminal vesicles play a crucial role in providing the necessary environment for the sperm to survive and function properly. The Cowper's gland and prostate also contribute to the composition of semen but do not primarily store sperm.Rate this question:
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- 31.
The production of sperm occurs in the _________ under the influence of _________ (hormone)
- A.
Seminiferous tubules, LH
- B.
Vas deferns, estrogen
- C.
Uterus, seminiferous tubules
- D.
Testes, testosterone
- E.
Only the urethra
Correct Answer
D. Testes, testosterone -
- 32.
If the ovidcut is ligated/ cut, the egg can not be fertilized or reach the uterus/ womb.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
If the oviduct is ligated or cut, it means that the pathway for the egg to travel from the ovary to the uterus is blocked or severed. This would prevent the egg from being fertilized by sperm and also hinder its ability to reach the uterus or womb for implantation. Therefore, the statement is true.Rate this question:
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- 33.
IN the human ejeculate of 2.5 ml, if ther are ________ million sperm or less a person is considered sterile.
- A.
50
- B.
100
- C.
200
- D.
20
Correct Answer
A. 50Explanation
In the human ejaculate of 2.5 ml, if there are 50 million sperm or less, a person is considered sterile. This means that their sperm count is significantly lower than the average, making it difficult for them to conceive a child naturally.Rate this question:
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- 34.
In men when the supply of sperm is adequate which hormone is produced to stop more sperm being made?
- A.
Estrogen
- B.
FSH
- C.
LH
- D.
Oxytocin
- E.
Inhibin
Correct Answer
E. InhibinExplanation
In men, when the supply of sperm is adequate, the hormone inhibin is produced to stop more sperm from being made. Inhibin acts as a negative feedback signal to the pituitary gland, inhibiting the production of follicle-stimulating hormone (FSH). FSH is responsible for stimulating the production of sperm in the testes. Therefore, when inhibin levels are high, it signals the body to decrease the production of FSH, leading to a decrease in sperm production and preventing the overproduction of sperm.Rate this question:
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- 35.
The egg must be fertilized before ovulation
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is false. Ovulation is the release of an egg from the ovary, and fertilization occurs when a sperm fertilizes the egg. In the human reproductive system, fertilization typically occurs in the fallopian tube after ovulation. Therefore, the egg does not need to be fertilized before ovulation; rather, fertilization occurs after ovulation.Rate this question:
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- 36.
Which of the following will give males trouble in the future if they long enough?
- A.
Corpora cavernosa
- B.
Corpora spongiosum
- C.
Prostate gland
- D.
Cowpers gland
- E.
A and b
Correct Answer
C. Prostate glandExplanation
The prostate gland is a small gland located below the bladder and in front of the rectum in males. It plays a crucial role in the reproductive system by producing and secreting fluid that nourishes and protects sperm. As males age, the prostate gland can become enlarged, leading to a condition called benign prostatic hyperplasia (BPH). BPH can cause urinary symptoms such as frequent urination, weak urine flow, and difficulty emptying the bladder. In some cases, it can lead to more serious complications such as urinary tract infections or bladder stones. Therefore, the prostate gland can give males trouble in the future if they live long enough.Rate this question:
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- 37.
Two hormones that occur in both males and females would be _________-
- A.
Testosterone and estrogen
- B.
Testosterone and progesterone
- C.
Progesterone and FSH
- D.
Estrogen and progesterone
- E.
FSH and LH
Correct Answer
E. FSH and LHExplanation
FSH (follicle-stimulating hormone) and LH (luteinizing hormone) are two hormones that occur in both males and females. FSH is responsible for the development of eggs in females and the production of sperm in males. LH plays a crucial role in the regulation of the reproductive system in both sexes, including the release of eggs in females and the production of testosterone in males. Therefore, FSH and LH are the correct answer as they are hormones present in both males and females.Rate this question:
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- 38.
When pregnancy occurs the hormone that will keep the corpus luteum functiong is ___________
- A.
Human chorionic gonadotropin
- B.
LH
- C.
Progesterone
- D.
LTH
- E.
Estrogen
Correct Answer
A. Human chorionic gonadotropinExplanation
During pregnancy, the hormone that will keep the corpus luteum functioning is human chorionic gonadotropin. This hormone is produced by the developing placenta and is responsible for maintaining the corpus luteum, which in turn produces progesterone. Progesterone is essential for maintaining the uterine lining and supporting the pregnancy. LH (luteinizing hormone) is involved in ovulation and not specifically related to the corpus luteum during pregnancy. LTH (luteotropic hormone) is not a recognized hormone, and estrogen does not directly play a role in maintaining the corpus luteum during pregnancy.Rate this question:
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- 39.
Castration or removal of the testes after puberty will effect _________.
- A.
Deep voice
- B.
More muscle mass
- C.
Hairyness
- D.
Aggressiveness
- E.
All of these
Correct Answer
D. AggressivenessExplanation
Castration or removal of the testes after puberty will affect aggressiveness. This is because testosterone, which is primarily produced in the testes, is a hormone that plays a role in promoting aggressive behavior. By removing the source of testosterone, the individual's levels of this hormone decrease, leading to a reduction in aggressiveness.Rate this question:
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- 40.
The initiation of egg formation and development at the beginning of each menstrual cycle is caused by __________
- A.
Estrogen
- B.
Progesterone
- C.
FSH
- D.
Estrogen and progesterone
- E.
FSH, LH
Correct Answer
C. FSHExplanation
FSH (follicle-stimulating hormone) is responsible for initiating egg formation and development at the beginning of each menstrual cycle. FSH stimulates the growth and maturation of ovarian follicles, which contain the eggs. This hormone is released by the pituitary gland in response to signals from the hypothalamus. Once the follicles mature, they release estrogen, which further prepares the uterus for potential pregnancy. Therefore, FSH plays a crucial role in the reproductive cycle by promoting the development of eggs.Rate this question:
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- 41.
Follicles in the ovary rupture to release the egg, some blood, and their are many follicle cells surrounding the egg.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because during the menstrual cycle, follicles in the ovary do rupture to release the egg, which is known as ovulation. Along with the egg, some blood and fluid are also released. Additionally, there are indeed many follicle cells surrounding the egg, as they provide nourishment and support to the developing egg.Rate this question:
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- 42.
The fertilized egg develops initially deep inside the __________ of the uterus.
- A.
Myometrium
- B.
Vagina
- C.
Ovary
- D.
Endometrium
Correct Answer
D. EndometriumExplanation
The fertilized egg develops initially deep inside the endometrium of the uterus. The endometrium is the inner lining of the uterus, which thickens each month in preparation for potential pregnancy. If fertilization occurs, the fertilized egg implants itself into the endometrium, where it receives nourishment and support for further development. This process is essential for the successful implantation and growth of the embryo.Rate this question:
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- 43.
Some of the anabolic steroids taken by athletes cause a lower production of testosterone
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Anabolic steroids are synthetic variations of the male hormone testosterone. When athletes take anabolic steroids, their bodies receive an external supply of testosterone, which signals the body to reduce its own production of the hormone. This is because the body tries to maintain a balance and prevent an excessive amount of testosterone. Therefore, it is true that some anabolic steroids taken by athletes can cause a lower production of testosterone.Rate this question:
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- 44.
In mammals the testes must be descended outside of the body for sperm to be viable.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In mammals, the testes must be descended outside of the body for sperm to be viable. This is because the temperature inside the body is too high for sperm production and survival. The testes descend into the scrotum during development to provide a cooler environment for sperm production. If the testes do not descend, the sperm may not be able to develop properly and become non-viable. Therefore, it is true that in mammals, the testes must be descended outside of the body for sperm to be viable.Rate this question:
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- 45.
The midpeice of the sperm carries the hyaluronidae while the acrosome contains mitochondrium.
- A.
True
- B.
False
Correct Answer
B. False -
- 46.
The energy used by the sperm to swim up the female system comes primarily from glycosis.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because glycolysis is the primary source of energy for sperm to swim up the female reproductive system. Glycolysis is a metabolic process that breaks down glucose into pyruvate, producing ATP (adenosine triphosphate) in the process. ATP is the main energy currency of cells, including sperm cells. Therefore, glycolysis provides the necessary energy for sperm motility and enables them to reach and fertilize the egg.Rate this question:
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- 47.
If two sperm enter the ovum at the same time, the embryo will develop into a functioning triploid adult.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is false. If two sperm enter the ovum at the same time, it will result in an abnormality called triploidy, where the embryo will have three sets of chromosomes instead of the normal two. Triploidy is not compatible with life and typically results in miscarriage or stillbirth.Rate this question:
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- 48.
Which ingredient of the semen is used in glycolysis by the sperm?
- A.
Fructose
- B.
Glucose
- C.
Maltose
- D.
Lactose
Correct Answer
B. GlucoseExplanation
Glucose is the correct answer because it is the main sugar used by sperm for energy production through glycolysis. Glycolysis is the process by which glucose is broken down into pyruvate, releasing energy in the form of ATP. This energy is essential for sperm motility and other cellular functions. While other sugars like fructose, maltose, and lactose may be present in semen, glucose is the primary fuel source for sperm metabolism.Rate this question:
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- 49.
The labia major and minor of females are openings that open and lead directly into the uterus.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The labia major and minor are not openings that lead directly into the uterus. They are external folds of skin that surround and protect the openings of the vagina and urethra in females. The uterus is connected to the vagina through the cervix, not the labia.Rate this question:
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- 50.
In the breasts the milk producing glands are modified sweat glands.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the milk-producing glands in the breasts, known as mammary glands, are indeed modified sweat glands. These glands undergo changes during pregnancy and lactation to produce and secrete milk for breastfeeding. This adaptation allows mammals to nourish their offspring with a specialized fluid that provides essential nutrients and antibodies for their growth and development.Rate this question:
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Current Version
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Feb 06, 2024Quiz Edited by
ProProfs Editorial Team -
May 05, 2010Quiz Created by
Kleigh471
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