KINS 4630 FINAL EXAM QUESTIONS AND
CORRECT ANSWERS
vagal withdrawal...
a) does not change heart rate
b) is not a thing
c)increases heart rate
d) reduces heart rate - answer c
As exercise intensity increases above lactate threshold, __________ is increasingly being
used in the working muscle - answer carbohydrate
Blood flow control to target tissue occurs primarily at which type of blood vessel -
answer arterioles
T/F: The lactate threshold is a fixed parameter and cannot be changed - answer false
Which of the following is the most important factor for determining the resistance to
blood flow?
a) blood vessel radius
b) blood pressure
c) blood vessel length
d) blood viscosity - answer a
In a heart transplant patient, which of the following mechanisms would not be available
to contribute to blood flow during exercise?
a) endothelial control
b) sympathetic nervous system-mediated control
c) myogenic control
d) metabolic control - answer b
Two men have the same VO2max value of 40 mL/kg/min. Are these individuals equally
fit? - answer Yes, their VO2max is the same so they are roughly equal in aerobic
capacity
Which of the following pathological conditions would result in ineffective skeletal muscle
,glucose uptake during exercise?
a) inability to stimulate glut4 receptor expression on muscle
b) inability to activate beta adrenergic receptors on adipose tissue
c) inability to secrete insulin
d) inability to secrete glucagon - answer a
Secretion of nitric oxide occurs with - answer endothelial control of blood flow
Which of the following typically provides the greatest contribution to an individuals total
daily energy expenditure?
a)Thermic effect of feeding
b) physical activity
c) resting metabolic rate - answer c
Contractile activity of the limbs helps increase venous return by activating - answer the
muscle pump
T/F: The lactate threshold and ventilatory threshold have the same underlying
mechanism - answer false
Central fatigue most specifically refers to - answer loss of motivation and lack of drive to
continue during prolonged exercise
Cardiovascular drift during exercise refers to the - answer progressive increase in heart
rate during exercise in the heat
During exercise, which vascular bed is subjected to the greatest change in blood flow? -
answer muscle
The anaerobic component of steady state exercise can be approximated by - answer the
oxygen deficit
Which of the following will increase stroke volume?
a)increased venous return
b)reduced contractility
c)increased heart rate
,d)increased afterload - answer a, increased venous return and ventricular filling
Blood flow in the brain _______ during exercise because of _________ control of blood
flow. - answer remains constant, myogenic
Which of the following is NOT a determinant of the maximal oxygen uptake?
a) maximal lactate clearance
b) maximal arteriovenous (a-VO2) difference
c) maximal heart rate
d) maximal cardiac output - answer a, maximal lactate clearance
A reduction in blood glucose during prolonged exercise, such as a marathon
a) results from muscle glycogen depletion
b) results from liver glycogen depletion
c) contributes to task failure
d) all of the above - answer d) all of the above
Which has the highest affinity for oxygen? - answer myoglobin
Reactive hypoglycemia refers to - answer the combined effects of muscle contraction
and insulin to cause glucose to drop too low
From 50% VO2max to m, increases in cardiac output are driven by which variable?
, a) heart rate and stroke volume equally
b) arteriovenous oxygen difference
c) stroke volume
d) heart rate - answer d) heart rate
T/F: The lactate threshold and ventilatory threshold occur at approximately the same
exercise intensity - answer true
Compared to rest, arterial oxygen content _________ during high intensity exercise -
answer does not change
From rest to approx. 50% VO2max, increases in cardiac output are driven by which
variable(s)? - answer both heart rate and stroke volume
Which of the following is the primary method of CO2 transport in blood?
a) bicarbonate
b)dissolved in plasma
c) bound to oxyhemoglobin
d) bound to deoxyhemoglobin - answer a) bicarbonate
CORRECT ANSWERS
vagal withdrawal...
a) does not change heart rate
b) is not a thing
c)increases heart rate
d) reduces heart rate - answer c
As exercise intensity increases above lactate threshold, __________ is increasingly being
used in the working muscle - answer carbohydrate
Blood flow control to target tissue occurs primarily at which type of blood vessel -
answer arterioles
T/F: The lactate threshold is a fixed parameter and cannot be changed - answer false
Which of the following is the most important factor for determining the resistance to
blood flow?
a) blood vessel radius
b) blood pressure
c) blood vessel length
d) blood viscosity - answer a
In a heart transplant patient, which of the following mechanisms would not be available
to contribute to blood flow during exercise?
a) endothelial control
b) sympathetic nervous system-mediated control
c) myogenic control
d) metabolic control - answer b
Two men have the same VO2max value of 40 mL/kg/min. Are these individuals equally
fit? - answer Yes, their VO2max is the same so they are roughly equal in aerobic
capacity
Which of the following pathological conditions would result in ineffective skeletal muscle
,glucose uptake during exercise?
a) inability to stimulate glut4 receptor expression on muscle
b) inability to activate beta adrenergic receptors on adipose tissue
c) inability to secrete insulin
d) inability to secrete glucagon - answer a
Secretion of nitric oxide occurs with - answer endothelial control of blood flow
Which of the following typically provides the greatest contribution to an individuals total
daily energy expenditure?
a)Thermic effect of feeding
b) physical activity
c) resting metabolic rate - answer c
Contractile activity of the limbs helps increase venous return by activating - answer the
muscle pump
T/F: The lactate threshold and ventilatory threshold have the same underlying
mechanism - answer false
Central fatigue most specifically refers to - answer loss of motivation and lack of drive to
continue during prolonged exercise
Cardiovascular drift during exercise refers to the - answer progressive increase in heart
rate during exercise in the heat
During exercise, which vascular bed is subjected to the greatest change in blood flow? -
answer muscle
The anaerobic component of steady state exercise can be approximated by - answer the
oxygen deficit
Which of the following will increase stroke volume?
a)increased venous return
b)reduced contractility
c)increased heart rate
,d)increased afterload - answer a, increased venous return and ventricular filling
Blood flow in the brain _______ during exercise because of _________ control of blood
flow. - answer remains constant, myogenic
Which of the following is NOT a determinant of the maximal oxygen uptake?
a) maximal lactate clearance
b) maximal arteriovenous (a-VO2) difference
c) maximal heart rate
d) maximal cardiac output - answer a, maximal lactate clearance
A reduction in blood glucose during prolonged exercise, such as a marathon
a) results from muscle glycogen depletion
b) results from liver glycogen depletion
c) contributes to task failure
d) all of the above - answer d) all of the above
Which has the highest affinity for oxygen? - answer myoglobin
Reactive hypoglycemia refers to - answer the combined effects of muscle contraction
and insulin to cause glucose to drop too low
From 50% VO2max to m, increases in cardiac output are driven by which variable?
, a) heart rate and stroke volume equally
b) arteriovenous oxygen difference
c) stroke volume
d) heart rate - answer d) heart rate
T/F: The lactate threshold and ventilatory threshold occur at approximately the same
exercise intensity - answer true
Compared to rest, arterial oxygen content _________ during high intensity exercise -
answer does not change
From rest to approx. 50% VO2max, increases in cardiac output are driven by which
variable(s)? - answer both heart rate and stroke volume
Which of the following is the primary method of CO2 transport in blood?
a) bicarbonate
b)dissolved in plasma
c) bound to oxyhemoglobin
d) bound to deoxyhemoglobin - answer a) bicarbonate
