Body Structures & Functions Updated
13th Edition
ISBN: 9780357191606
Author: Scott
Publisher: Cengage
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The formation and release of hormones from a cell or structure is calleda. digestion.b. excretion.c. synthesis.d. secretion.
Which of the following statements concerning insulin is NOT true?
a.
Insulin can increase glycogen synthesis.
b.
The presence of insulin can increase glucose uptake.
c.
Insulin can increase the secretion of epinephrine.
d.
It is secreted by the beta cell of pancreas.
e.
Glucose in blood can up-regulate the secretion of insulin.
Which of these is not a means by which hormones are eliminatedfrom the circulatory system?a. excreted into urine or bileb. bound to binding proteinsc. enzymatically degraded in the blood (metabolism)d. actively transported into cellse. conjugated with sulfate or glucuronic acid
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- A.Where are glucocorticoids made? (cells, organ) B.What organ/or cells secrete them? (may differ from site of formation) C.What stimulates their secretion? Explain negative feedback control of secretion. D.Where do they work (target) E.What do they regulate: physiological outcome?arrow_forwardWhich of the following correctly describes the hormone insulin? a. It is produced by B cells in the pancreas. b. It increases glucose uptake by liver and muscle cells. c. It is a peptide hormone. d. It lowers blood glucose levels. e. All of these are correct.arrow_forwardndicate whether each of the following statements is true or false. If false, correct the statement or provide a briefexplanation for why it is false.a. Insulin increases the rate of glucose uptake by the tissues.b. Glucagon is the hormone that signals low blood glucose levels.c. The muscles can use glucose, fatty acids and ketone bodies for fuel.d. Epinephrine stimulates breakdown of glycogen in muscles when there is an immediate needfor energy by muscle cells.e. Glucagon stimulates glycogenolysis to maintain the blood glucose concentration.f. With high [carbohydrate] levels, excess glucose (after glycogen storage has reached amaximum) is converted to fat.g. The high potential electrons of NADH enter the respiratory chain at NADH-Q reductase.h. Ubiquinol (QH2) is also the entry point for electrons from NADH of flavoproteins.i. Cytochrome reductase catalyzes the transfer of electrons from cytochrome c to O2.arrow_forward
- Diabetes mellitus is a disease characterized by the: a. inadequate production of insulin in the body. b. rapid break down of carbohydrates in the body. c. excessive movement of blood glucose into various body cells. d. failure of the body to produce ketonesarrow_forwardWhich of the following statements about insulin is true? a. Insulin acts as a transport protein, cany in g glucose across the cell membrane. b. Insulin facilitates the movement of inti acellular glucose transporters to the cell membrane. c. Insulin stimulates the breakdown of stored glycogen into glucose. d. Insulin stimulates the kidneys to reabsorb glucose into the bloodstream.arrow_forwardA hormone differs from a neurotransmitter in thata. hormones act extracellularly, whereas neurotransmitters act withinthe cell that synthesized them.b. hormones are released only by neurons, whereas neurotransmittersare released by many different types of cells.c. hormones cause only fast responses (seconds or less) to stimuli,whereas neurotransmitters cause slow responses (minutes to hours)to stimuli.d. hormones affect only epithelial cells, whereas neurotransmittersaffect only muscle cells.e. hormones are released into the bloodstream and can activate manycells in many parts of the body, whereas neurotransmitters arereleased by neurons and affect adjacent cells.arrow_forward
- Which of the following best describes hormones? a. Hormones are relatively unstable and work only in the area adjacent to the gland that produced them. b. Hormones are long-lasting chemicals released from glands. c. All hormones are lipid-soluble. d. Hormones are chemical messengers that are released into the environment.arrow_forwardWhich of these statements about the hormone insulin is true? a.It is secreted by alpha cells in the pancreatic islets. b.It is secreted in response to a rise in blood glucose. c.It stimulates the production of glycogen and fat. d.Both a and b are true. e.Both b and c are true.arrow_forwardGlucocorticoids (cortisol)a. increase the breakdown of lipids.b. increase the breakdown of proteins.c. increase blood glucose levels.d. decrease inflammation.e. All of these are correctarrow_forward
- Thyroid hormone is the primary hormone that regulates body temperature. It does so by a. stimulating muscle contraction. b. increasing the number of Na+/K+ pumps in neurons. c. vasoconstriction of peripheral blood vessels. d. sweating.arrow_forwardWhich of the following correctly describes the functions of the endocrine system? a. Transport of blood through the body and through the lungs b. Regulation of body functions through hormone secretion c. Regulation of body functions through nerve impulses d. Immunity and returning extra tissue fluid to the blood vesselsarrow_forwardHormone X appears to regulate the blood concentration of chemical Y via a negative feedback loop. a. Predict what happens to the secretion of hormone X when the blood concentration of chemical Y decreases. b. What effect will this likely have on the blood concentration of chemical Y?c. Predict what happens to the secretion of hormone X when the blood concentration of chemical Y increases.arrow_forward
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