Life Science 1

105 Questions | Total Attempts: 20

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Life Science Quizzes & Trivia

Muliple choice test


Questions and Answers
  • 1. 
    The skin belongs to the ... system:
    • A. 

      Nervous

    • B. 

      Integumentary

    • C. 

      Circulatory

    • D. 

      Muscular

  • 2. 
    The two main layers of the skin are:
    • A. 

      Dermis and medulla

    • B. 

      Epidermis and cortex

    • C. 

      Dermis and epidermis

    • D. 

      Epidermis and capillaries

  • 3. 
    The fibrous protein that replaces cytoplasm, as cells of the epidermis progress towards the surface is
    • A. 

      Collagen

    • B. 

      Melanin

    • C. 

      Elastin

    • D. 

      Keratin

  • 4. 
    Choose the following statement that is true:
    • A. 

      Melanin is a brownish black pigment produced by melanocytes

    • B. 

      Carotene is an orange yellow pigment found inside epidermal cells

    • C. 

      Skin colour is due to an interaction between pigment concentration and composition and blood supply

    • D. 

      All of the above

  • 5. 
    Constant sunbathing can result in skin cancer because, inskin cells ultraviolet light can produce
    • A. 

      Mutations in DNA

    • B. 

      Extra dark pigments

    • C. 

      Carcinogens

    • D. 

      Oncogenes

  • 6. 
    Which of the following is NOT a function of the skin?
    • A. 

      Produces vitamin C in the presence of sunlight

    • B. 

      Insulates and cushions the body

    • C. 

      Protects the whole body from mechanical damage

    • D. 

      Manufactures several proteins important to immunity and synthesis vitamin D in the presence of sunlight

  • 7. 
    Special smooth muscles in the dermis that, when contracted produce "goose bumps" are:
    • A. 

      Striated muscles

    • B. 

      Arrector pili

    • C. 

      Pacinian corpuscles

    • D. 

      Root sheaths

  • 8. 
    The substance in the dermis that gives the skin its strength is:
    • A. 

      Haemoglobin

    • B. 

      Melanin

    • C. 

      Collagen

    • D. 

      Vitamin D

  • 9. 
    The dermis is abundantly supplied with... that play a role in maintaining body temperature homeostasis
    • A. 

      Nerve endings

    • B. 

      Lymphatic vessels

    • C. 

      Blood vessels

    • D. 

      Melanocytes

  • 10. 
    The epidermis and dermis are normally firmly connected together, however a burn or friction may cause these layers to separate which results in:
    • A. 

      An abscess

    • B. 

      A blister

    • C. 

      A sty

    • D. 

      A pimple

  • 11. 
    Skin helps to decrease body temperature by
    • A. 

      Increasing blood supply to skin

    • B. 

      Decreasing blood supply to skin

    • C. 

      Decreasing sweating

    • D. 

      Arrector pili muscles contracting and pulling hairs upright

  • 12. 
    The temperature of the body remains fairly constant at:
    • A. 

      36.9

    • B. 

      36.4

    • C. 

      36.8

    • D. 

      36.6

  • 13. 
    The best method to prevent heat loss from the body is:
    • A. 

      Several layers of lightweight clothes

    • B. 

      One layer of lightweight clothes

    • C. 

      One layer of heavyweight clothes

    • D. 

      None of the above

  • 14. 
    Loss of heat by the secretion of sweat by sweat glands occurs by a mechanism called:
    • A. 

      Convection

    • B. 

      Evaporation

    • C. 

      Radiation

    • D. 

      Conduction

  • 15. 
    A key function of sebum secreted by the sebaceous glands is:
    • A. 

      To moisturise the skin

    • B. 

      Regulate body temperature

    • C. 

      To prevent drying and cracking of the skin

    • D. 

      None of these

  • 16. 
    Urine passes throught the urinary system in the following order
    • A. 

      Kidney, urethra, bladder, ureter

    • B. 

      Kidney, bladder, ureter, urethra

    • C. 

      Kidney, ureter, bladder, urethra

    • D. 

      Kidney, ureter, urethra, bladder

  • 17. 
    Production of the urine occurs in the:
    • A. 

      Nephron

    • B. 

      Bladder

    • C. 

      Ureter

    • D. 

      Urethra

  • 18. 
    The function of the urethra is to:
    • A. 

      Transport urine to the bladder

    • B. 

      Transport urine to the liver

    • C. 

      Transport urine to the outside

    • D. 

      Transport urine to the kidneys

  • 19. 
    Women tend to be more susceptible to bacterial infection of the bladder than men due to:
    • A. 

      A shorter ureter than men

    • B. 

      A longer ureter than men

    • C. 

      A shorter urethra than men

    • D. 

      A larger bladder than men

  • 20. 
    Which of the following is not a function of the urinary system?
    • A. 

      Regulation of body fluids and electrolyte concentrations

    • B. 

      Production of urine

    • C. 

      Production of urea

    • D. 

      Excretion of waste

  • 21. 
    The functional unit of the urinary system is the :
    • A. 

      Kidney

    • B. 

      Neurone

    • C. 

      Loop of henle

    • D. 

      Nephron

  • 22. 
    The inner zone of the kidney is called the:
    • A. 

      Renal cortex

    • B. 

      Ureter

    • C. 

      Bladder

    • D. 

      Renal medulla

  • 23. 
    The number of nephrons contained within each kidney is about:
    • A. 

      Ten thousand

    • B. 

      One million

    • C. 

      Five million

    • D. 

      Ten million

  • 24. 
    Bowmans capsule
    • A. 

      Is in the bladder

    • B. 

      Surrounds the glomerulus

    • C. 

      Is in the urethra

    • D. 

      Is in the renal artery

  • 25. 
    Fluid in the nephron reaches the loop of henle after it reaches the:
    • A. 

      Bowmans capsule

    • B. 

      Proximal convoluted tubule

    • C. 

      Both of these

    • D. 

      Neither of these