Exercise Phys Exam 2

Front 1

Maximum SV of the heart is reached at approximately _____% of the VO2 max

Back 1

40-50%

Front 2

Aerobic exercise training results in the following adaptations relative to maximal exercise

Back 2

A) Increase in Stroke volume
B) Increase in Heart rate
C) Increase in cardiac output
D) a and c
E) all of the above

Front 3

During exercise the arteriovenous oxygen different increases relative to resting values. This is due to:

Back 3

A) Vasoconstriction and increased vascular resistance
B) Vasodilation and decreased vascular resisitance
C) Vasodilation and increased vascular resistance
D) Vasoconstriction and decreased vascular resistance
E) None of the above

Front 4

When one begins to exercise, what happens to the value of a-VO2 difference from rest towards maximal exercise?

Back 4

A) Decreases
B) Increases
C) No change
D) None of the above

Front 5

Increase in ventilation during submaximal exercise is due to:

Back 5

A) Increase in the blood pH
B) Increase in the blood PCO2
C) Increase in the blood PO2
D) a and b
E) a and c

Front 6

The respiratory quotient:

Back 6

A) For carbohydrates is 1.00
B) Increases with increasing work intensity
C) Equals VCO2/VO2
D) a and b
E) All of the above

Front 7

Endurance athletes achieve higher maximal cardiac outputs through large increases in which variable of the cardiac output formula?

Back 7

A) Stroke volume
B) Heart rate
C) Peripheral resistance
D) All the of the above
E) both a and b

Front 8

During maximal exercise, ______% of total cardiac output is directed to contracting skeletal muscle

Back 8

80-85%

Front 9

The flat portion of the oxyhemoglobin dissociation curve indicates that:

Back 9

A) there is a high degree of O2 dissociation form hemoglobin despite only small decreases in PO2
B) a light decrease in body temperature may result in a large a-VO2 difference
C) large changes in PO2 are associated with small changes in the amount of O2 held by hemoglobin
D) all of the above
E) none of the above

Front 10

What is the effect of the dramatic drop in PO2 in the working muscle cell?

Back 10

A) the PCO2 also drops dramatically
B) More O2 dissociates with hemoglobin
C) The temperature around the cell also drops
D) The pH around the cell increases

Front 11

Control of the ventilatory frequency as well as tidal volume by the cardiorespiratory control center is mediated by Acetylcholine

Back 11

True
False

Front 12

Vital Capacity refers to the maximum amount of gas that can be expired after a maximal inspiration

Back 12

True
False

Front 13

The fick equation expresses the relationship between CO, O2 consumption, and the arterial mixed venous oxygen content

Back 13

True
False

Front 14

Diastolic blood pressure remains relatively unchanged during exercise

Back 14

True
False

Front 15

During exercise, vasodilation in the liver results in increased blood flow to that area

Back 15

True
False

Front 16

As cardiac output and blood pressure increases, peripheral resistance dereases

Back 16

True
False