10 Jun BIO 139 – Which of the following mechanisms allows blood
Question
36. Which of the following mechanisms allows blood pressure and blood flow to remain constant to the heart and brain while decreasing the blood flow to other organs/tissues? (This occurs during blood loss or shock…….it also occurs when the
Sympathetic Nervous System is activated: think, Epinephrine).
A. peripheral vascular augmentation
B. cardiac contractility
C. target-cell receptor regulation
D. selective vasoconstriction
E. None of the above is correct.
37. Two hormones control our plasma Glucose concentration. Insulin causes glucose
storage (via cellular uptake and storage); Glucagon causes cellular-release of stored
glucose…………so, which of the following dysfunctions could lead to hyperglycemia?
A. hypercortisolism
B. hypoinsulinism
C. hyperglucagonism
D. All of the above are correct.
E. None of the above is correct.
38. Which of the following dysfunctions could lead to hypoglycemia?
A. hypocortisolism
B. hyperinsulinism
C. hypoglucagonism
D. All of the above are correct.
E. None of the above is correct.
39. Which of the following symptoms would be expected in an individual suffering from
hyperthyroidism?
A. unexplained weight gain
B. insomnia
C. cold intolerance
D. centripetal obesity
E. None of the above is correct.
40. Theophylline is a naturally occurring molecule found within Tea and Coffee. Clinically
it is known as Aminophylline. The substance increases intracellular cyclic-AMP levels
by decreasing the activity of one of the intracellular proteins involved in the cyclic-
AMP cascade. Which intracellular protein is inhibited by Theophylline?
A. Beta – receptors
B. G-proteins
C. Adenylate Cyclase
D. Phosphodiesterase
E. None of the above is correct.
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