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1
Which of the following is not considered part of the human endocrine system?
A)Thyroid
B)Adrenal gland
C)Heart
D)Pituitary
E)All of the choices are components of the human endocrine system.
2
Which one of the following is a hormone secreted by the posterior pituitary gland?
A)Growth hormone
B)Prolactin
C)Oxytocin
D)Luteinizing hormone
E)Follicle-stimulating hormone
3
Which of the following statements about the thyroid gland is correct?
A)The thyroid gland contains small amounts of thyroglobulin.
B)Thyroid tissue is always consolidated into a single structure.
C)Thyroid hormones provide a negative feedback mechanism by acting on the hypothalamus and anterior pituitary.
D)Because of its small size, iodide diffuses directly across the plasma membrane.
E)All of the statements about the thyroid gland are correct.
4
Parathyroid hormone contributes to _______ homeostasis; aldosterone contributes to _______ homeostasis.
A)Ca 2+ ; Na +
B)K; Na +
C)Cl - ; Na +
D)Na + ; Ca2+
E)K + ; Cl -
5
True or False: The process by which cells form specific tissues with specific functions is most accurately referred to as differentiation.
A)True
B)False
6
Which of the following sex steroids produced by the anterior pituitary gland is found in females but not in males?
A)Follicle stimulating hormone
B)Testosterone
C)Luteinizing hormone
D)Estradiol
E)All of the sex steroids are produced by both females and males
7
Which of the following is not a common function of glucocorticoids?
A)Stimulate lung maturation in the fetus
B)Inhibit bone growth and formation
C)Stimulate breakdown of triglycerides
D)Inhibit sensitivity to insulin
E)Stimulate glycogenolysis
8
An athlete looking for an edge in which one of the following sports would be most likely to use erythropoietin to gain a competitive advantage?
A)Football
B)Baseball
C)Cycling
D)Sprinting
E)Tennis
9
Match the class of hormone on the left with the representative example on the right.
i: peptidea: norepinephrine
ii: Amineb: cortisol
iii: Steroidc: Glucagon
A)i = a; ii = c; iii = b
B)i = c; ii = b; iii = a
C)i = a; ii = b; iii = c
D)i = c; ii = a; iii = b
E)i = b; ii = a; iii = c
10
Which of the following hormones is most likely to bind to an intracellular messenger?
A)Norepinephrine
B)Leptin
C)Glucagon
D)Testosterone
E)Insulin
11
Which of the following statements about hormone levels is incorrect?
A)Levels of steroid hormones are directly related to the activity and amount of enzymes capable of modifying cholesterol.
B)Most hormones circulate in the blood at all times, although their levels vary.
C)Expression of peptide hormones increases in stimulated cells, and the hormone diffuses across the plasma membrane into the extracellular fluid.
D)Levels of melatonin would be affected by a deficiency in tryptophan.
E)All of the statements about hormone levels are correct.
12
True or False: Peptide hormones are packaged and stored in secretory vesicles until the cell is stimulated to release them.
A)True
B)False
13
Which of the following statements regarding neurohormones is incorrect?
A)Any hormone made in and secreted by a neuron is a neurohormone
B)All neurohormones are amine or peptides
C)Neurohormones act as neurotransmitters
D)Neurohormones are secreted by the hypothalamus
E)All of the statements regarding neurohormones are correct
14
Which of the following represents a mechanism for preventing a hormone from exerting its effects?
A)Direct excretion of small, water soluble hormones
B)Chemical modification of lipid soluble hormones in the liver for excretion
C)Endocytosis of hormones that bind to plasma membrane receptors
D)Negative feedback processes
E)All of the choices represent mechanisms for preventing a hormone from exerting its effects.
15
True or False: Humans can continue to produce thyroid hormones for several months even without iodine in their diet.
A)True
B)False
16
Which one of the following hormones is produced by the pancreas?
A)glucagon
B)insulin
C)cortisol
D)Glucagon and insulin
E)Glucagon, insulin, and cortisol
17
When blood glucose levels are falling, the liver is stimulated to release glucose stored in the form of
A)starch.
B)sucrose.
C)glycogen.
D)glucagon.
E)triglycerides.
18
Which of the following statements about glucose metabolism is incorrect?
A)In type 1 diabetes mellitus, insulin levels are insufficient even after a meal.
B)Insulin is essential for survival in animals.
C)Type 1 diabetes mellitus is characterized by an autoimmune response which destroys insulin-producing cells.
D)High levels of insulin cause glucose transporters to localize to intracellular vesicles.
E)All of the statements about glucose metabolism are correct.
19
Which of the following hormones does not play a primary role in invertebrate growth?
A)Juvenile hormone
B)Growth hormone
C)Ecdysone
D)Brain hormone
E)All of the hormones play primary roles in invertebrate growth.
20
Which of the following statements regarding "fight or flight" is incorrect?
A)Fight or Flight is rapid stress response
B)Glucocorticoids are produced by the adrenal glands to promote gluconeogenesis in the liver
C)Respiratory airways dilate to decrease resistance and increase oxygen affinity
D)Heart rate and strength of pumping increase
E)Digestive and metabolic processes halt





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