Life Science 1
Muliple choice test
- 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
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