210 MHR • Unit 2 Homeostasis
REVIEW
UNIT 2
Multiple Choice
In your notebook, write the letter of the best
answer(s) for each of the following questions. (You
may select more than one item per question.)
1.Which of the following substances are not
normally found in urine?
(a)sodium (d)urea
(b)water (e)uric acid
(c)glucose
2.Which of the following is/are normally not part
of the fight-or-flight reflex?
(a)increase in blood glucose level
(b)increase in oxygen level in blood
(c)increase in thyroid hormone level in blood
(d)increase in testosterone level in blood
(e)increase in pH of blood
3.Which of the following structures is/are not
part of the peripheral nervous system?
(a)sensory receptors in skin
(b)spinal cord
(c)sensory neuron
(d)motor neuron
(e)hypothalamus
4.Which of the following structures, if any, could
be considered part of both the peripheral and
central nervous systems?
(a)sensory receptors in skin
(b)spinal cord
(c)sensory neuron
(d)motor neuron
(e)hypothalamus
5.Which of the following organ(s) act(s) as both
an exocrine and endocrine gland?
(a)pituitary (d)parathyroid gland
(b)thyroid gland (e)hypothalamus
(c)pancreas
6.Which of the following organs secrete(s) pairs
of antagonistic hormones?
(a)pituitary (d)parathyroid gland
(b)thyroid gland (e)hypothalamus
(c)pancreas
7.Which of the following substances is/are used
by the body to make hormones?
(a)proteins (d)polypeptides
(b)glucose (e)vitamins
(c)cholesterol8.Which of the following illnesses are not
initially caused by an endocrine disorder?
(a)osteoporosis (d)arthritis
(b)cancer (e)Type 1 diabetes
(c)high blood pressure
Short Answer
In your notebook, write a sentence or a short
paragraph to answer each of the following questions.
9.Which system plays the dominant role in
managing the body’s response to stress: the
central nervous system or the endocrine
system? Explain your answer.
10.Which is more common in the human body:
steroid or non-steroid hormones? In general,
what are the major differences in the way each
type of hormone interacts with target cells?
11.How does the body restore and maintain a
normal homeostatic state after exposure to
extreme environmental temperatures?
12.Which organs in the body secrete tropic
hormones? How does the action of tropic
hormones differ from that of other types of
hormones?
13.Explain why the secretion of oxytocin during
childbirth is normally regulated by a positive
feedback loop.
14.Can women become pregnant after menopause?
Explain your answer.
15.What prevents a second pregnancy in a woman
who is already pregnant?
16.What part of the eye is referred to in each of
the following descriptions (the diagram on the
facing page may help you identify the parts)?
(a)regulates the amount of light entering the
pupil of the eye
(b)the pigmented inner layer made up of
photoreceptor cells
(c)a protective layer that extends over the lens
(d)the photoreceptor cells that function in
colour vision
(e)the part of the retina that is the centre of
the visual field and is made up of cones
(f )adjusts the shape of the lens
(g)the photoreceptor cells most active in low
light conditionsUNDERSTANDING CONCEPTS