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| 1 |
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Q:
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Which of the following is NOT true about insulin? |
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A
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Insulin increases the intracellular concentration of glucose in hepatocytes |
B
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Insulin increases the capacity of the liver to synthesize glycogen |
C
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Insulin has effects opposite to the effects of glucagon |
D
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Insulin has effects similar to the effects of epinephrine |
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Tags:
Hormonal Regulation | Protein Structure and Function | |
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| 3 |
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Q:
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Which of the following hormones, when released from the posterior pituitary, would result in less frequent urination? |
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A
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ADH |
B
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TSH |
C
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FSH |
D
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Aldosterone |
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Tags:
Hormonal Regulation | Endocrine System | |
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| 4 |
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Q:
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Synthexrin, a newly developed synthetic hormone, is found to stimulate release of glucagon. What will most likely happen to a patient treated with synthexrin? |
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A
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glycogen will be broken down to glucose, increasing blood sugar levels |
B
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glycogen will be broken down to glucose, decreasing blood sugar levels |
C
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glucose will be converted to glycogen, increasing blood sugar levels |
D
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glucose will be converted to glycogen, decreasing blood sugar levels |
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Tags:
Hormonal Regulation | |
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| 5 |
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Q:
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The hormone glucagon binds to a G protein-coupled receptor to activate a cellular response. If a competitive inhibitor to the receptor is present, what is the overall effect in the body? |
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A
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Blood sugar decreases |
B
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Blood sugar increases |
C
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Decreased glucagon in the pancreas |
D
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Increased osmotic pressure of the blood. |
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Tags:
Control of Enzyme Activity | Hormonal Regulation | |
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| 6 |
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Q:
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The liver is NOT responsible for which of the following? |
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A
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Producing gastrin, which stimulates gastric acid and pepsinogen secretion in the stomach. |
B
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Synthesis of proteins involved in coagulation of blood. |
C
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Regulation of blood glucose homeostasis. |
D
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Removal of bile pigment from haemoglobin breakdown. |
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Tags:
Hormonal Regulation | Digestive System | |
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| 7 |
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Q:
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Beta cells are cells in the pancreas which release insulin after eating a meal. Which of the following could be seen intracellularly in such cells? |
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A
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Bile salt transporters localized to the nucleus |
B
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Peptidoglycan in the cellular membrane |
C
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High concentrations of actin filaments |
D
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A relatively large amount of rough ER |
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Tags:
Hormonal Regulation | Eukaryotic Cells | Digestive System | |
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| 8 |
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Q:
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Glucagon is an extremely important hormone in the body which has global effects on the body's physiology. Which of the following would be expected in an individual who has a defect in glucagon receptors? |
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A
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Increased glucose levels in the blood |
B
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Shortage of glucose to the brain during exercise |
C
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Large spikes in heart rate |
D
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All of the above |
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Tags:
Hormonal Regulation | |
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| 9 |
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Q:
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A cell which lacks a nucleus can do all of the following except |
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A
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convert glucose into energy |
B
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regulate intracellular ion concentrations |
C
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be entered by a virus |
D
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respond to steroid hormones |
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Tags:
Hormonal Regulation | Eukaryotic Cells | |
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| 10 |
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Q:
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Glucocorticoids both block the activity of insulin and stimulate gluconeogenesis. Which of the following would be an expected effect of glucocorticoid use? |
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A
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elevated blood sugar levels |
B
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increased basal metabolic rate |
C
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increased sensitivity to immunological challenge |
D
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increased bone density |
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Tags:
Glycolysis, Gluconeogenesis, PPP | Hormonal Regulation | |
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| 11 |
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Q:
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Which of the following molecules would be expected to increase in expression in low glucose states? |
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A
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insulin |
B
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ACTH |
C
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prolactin |
D
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glucagon |
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Tags:
Hormonal Regulation | |
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| 12 |
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Q:
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Which one of the following endocrine systems is involved in the establishment and maintenance of human circadian rhythms? |
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A
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Pituitary gland
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B
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Pineal gland
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C
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Pancreas |
D
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Thyroid gland
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Tags:
Endocrine System | Hormonal Regulation | |
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| 13 |
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Q:
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Antidiuretic hormone (ADH) has two primary functions: retain water in the body and constrict blood vessels. During emergency situations, ADH is released in order to counteract blood loss. Which of the following best describes the mode of action for ADH during this event?
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A
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ADH increases blood pressure by acting on the kidney to cause decreased urine production
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B
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ADH increases blood pressure by acting on the kidney to cause increased urine production
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C
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ADH acts on blood vessels to cause vasodilation, thus decreasing blood loss
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D
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ADH acts on blood vessels to cause vasodilation, thus increasing blood loss
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Tags:
Renal System | Hormonal Regulation | |
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| 14 |
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Q:
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What type of hormone is released from a cell and then acts on neighboring cells? |
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A
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Endocrine |
B
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Autocrine |
C
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Intracrine |
D
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Paracrine |
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Tags:
Endocrine System | Hormonal Regulation | |
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| 15 |
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Q:
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In humans, the menstrual cycle has three phases: follicular (prior to egg release), ovulatory (egg release), and luteal (after the egg is released). Which of the following is the cause behind luteinizing hormone (LH) secretion during the the menstrual cycle? |
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A
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The hormone estrogen during the luteal phase of the cycle
|
B
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The hormone estrogen during the follicular phase of the cycle
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C
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The hormone progesterone during the follicular phase of the cycle
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D
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The hormone testosterone during the luteal phase of the cycle
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Tags:
Reproductive System | Hormonal Regulation | |
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| 16 |
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Q:
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A patient with hyperthyroidism elects to have her thyroid removed. Immediately after removal (and before any postoperative actions), which of the following will be most affected? |
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A
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Control of urination |
B
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Control of digestion |
C
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Glucose homeostasis |
D
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Calcium homeostasis |
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Tags:
Hormonal Regulation | |
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| 17 |
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Q:
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Signal transduction describes the process of extracellular signalling molecules and ligands binding to cell-surface receptors which triggers events inside the cell. Which of the following best describes an event NOT typically associated with signal transduction started by extracellular signals? |
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A
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The binding of epinephrine to adrenergic receptors |
B
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Protein phosphorylation |
C
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A steroid hormone binding to its receptor |
D
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Activation of secondary messenger molecules |
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Tags:
Membrane Transport and Signalling | Hormonal Regulation | |
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| 18 |
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Q:
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Which of the following is best associated with steroid hormones? |
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A
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Steroid hormones are water-soluble
|
B
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The effects of steroid hormones are mediated by binding to a soluble receptor protein
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C
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Steroid hormones are synthesized directly from amino acid precursors
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D
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The intracellular actions of steroid hormones are mediated by small peptides
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Tags:
Lipids | Hormonal Regulation | |
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| 20 |
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Q:
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Which of the following is TRUE regarding unfertilized oocytes in human females? |
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A
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Unfertilized oocytes mature in the uterus.
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B
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Unfertilized oocytes mature in response to an increase in FSH and LH.
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C
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Unfertilized oocytes mature in response to an increase in gonadotropin releasing hormone (GnRH).
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D
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Unfertilized oocytes mature in response to an increase in estrogen.
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Tags:
Reproductive System | Hormonal Regulation | Endocrine System | |
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| 21 |
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Q:
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A woman with regular menstrual cycles undergoes fertility testing. Tests reveal a typical LH surge occurring; however, additional testing also shows low progesterone levels throughout the menstrual cycle. Which of the following is most likely responsible for any difficulties in conception? |
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A
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Inability to develop mature vesicular follicles
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B
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Estrogen deficiency
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C
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GnRH deficiency
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D
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Inability to develop a healthy corpus luteum
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Tags:
Hormonal Regulation | Reproductive System | Endocrine System | |
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| 22 |
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Q:
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A researcher is testing a new molecular compound and notes that the compound is an antagonist of estrogen. If present in the body, this compound would likely: |
|
A
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block LH production and prevent ovulation.
|
B
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inhibit the production of GnRH.
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C
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block serotonin production.
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D
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prevent the formation of primary oocytes.
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Tags:
Endocrine System | Reproductive System | Hormonal Regulation | |
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| 25 |
Go |
Q:
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What type of drug would be best suited to increasing urine production? |
|
A
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A drug which decreases the vascular pressure in the glomerulus. |
B
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An aldosterone receptor antagonist |
C
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A thyroxine mimic. |
D
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An antidiuretic hormone mimic |
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Tags:
Hormonal Regulation | Renal System | |
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| 26 |
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Q:
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Luteinizing hormone generally surges and peaks in women immediately prior to which of the following? |
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A
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menstruation |
B
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fertilization |
C
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birth |
D
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ovulation |
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Tags:
Hormonal Regulation | Reproductive System | |
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| 27 |
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Q:
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Which of the following is an example of a peptide hormone? |
|
A
|
insulin |
B
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estrogen |
C
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mineralocorticoids |
D
|
thyroxine |
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Tags:
Hormonal Regulation | |
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| 28 |
Go |
Q:
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Which of the following is not a broad category of hormones? |
|
A
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peptide hormones |
B
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tyrosine derivatives |
C
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steroid hormones |
D
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N-acetylcysteine derivatives |
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Tags:
Hormonal Regulation | |
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| 29 |
Go |
Q:
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Which of the following is incorrect regarding hormone signaling? |
|
A
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Hormones can be lipophilic or lipophobic. |
B
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Hormones can enact changes through cAMP activation. |
C
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Hormones are responsible for cell-to-cell communication. |
D
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cAMP is required for extracellular binding of hormones. |
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Tags:
Hormonal Regulation | |
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