121. Increased pressure in the aortic arch will activate the : 1380535

121. Increased pressure in the aortic arch will activate the : 1380535.


121.  Increased pressure in the aortic arch will activate the aortic arch reflex and cause  
A.  a decrease in the frequency of action potentials from the aortic baroreceptors.
B.  increased parasympathetic stimulation of the heart.
C.  vasoconstriction of peripheral vessels increasing the blood pressure.
D.  increased ADH secretion.
E.  increased sympathetic stimulation of the heart.

122.  When a person rises quickly from a lying position, there is  
A.  an increase in the frequency of action potentials produced by the baroreceptors.
B.  an increase in vasomotor sympathetic stimulation to the blood vessels causing vasoconstriction.
C.  reflexive slowing of the heart.
D.  an increase of parasympathetic stimulation of the heart.
E.  a decrease in heart rate and stroke volume.

123.  Peripheral chemoreceptors  
A.  are located in the aortic and carotid bodies.
B.  are sensitive to small changes in oxygen levels in the blood.
C.  monitor blood pressure.
D.  are not sensitive to carbon dioxide or hydrogen ion levels.
E.  are not sensitive to changes in pH of the blood.

124.  The chemoreceptor reflexes help maintain homeostasis  
A.  under normal conditions.
B.  when carbon dioxide levels increase.
C.  when stimulated by changes in blood osmotic pressure.
D.  when epinephrine levels increase.
E.  when hydrogen ion concentrations decrease.

125.  The central nervous system ischemic response  
A.  is triggered by an increase in blood flow to the vasomotor center.
B.  plays an important role in controlling blood pressure under emergency conditions.
C.  is stimulated by a rise in oxygen.
D.  is inhibited by a rise in the level of hydrogen ions.
E.  plays an important role in regulating blood pressure under normal conditions.

126.  Which of the following hormones does NOT influence blood pressure?  
B.  epinephrine
C.  atrial natriuretic hormone
D.  aldosterone
E.  growth hormone

127.  Which of the following is NOT involved in short-term regulation of blood pressure?  
A.  baroreceptor reflex
B.  adrenal medullary mechanism
C.  alteration in blood volume
D.  chemoreceptor mechanism

128.  Which of the following is NOT a long-term regulator of blood pressure?  
A.  renin-angiotensin-aldosterone mechanism
B.  vasopressin mechanism
C.  stress-relaxation response
D.  oxygen tension response

129.  Angiotensin II  
A.  causes vasoconstriction.
B.  stimulates the adrenal cortex to release ADH.
C.  is released in response to high blood pressure.
D.  is responsible for increasing urine output.
E.  stimulates peripheral vasodilation.

130.  Which of the following would occur as a result of increased renin release by the kidneys?  
A.  an increase in vasodilator secretion
B.  an increase in urine output
C.  an increase in blood volume
D.  a decrease in aldosterone
E.  a decrease in blood pressure



121. Increased pressure in the aortic arch will activate the : 1380535

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