ACE Exercise Physiology 2

Question 1

Which of the following is the PRIMARY determinant of cardiac output?

Accepted Answer

Heart rate × stroke volume

Answer

Blood pressure × total peripheral resistance

Answer

Respiratory rate × tidal volume

Answer

Hemoglobin concentration × oxygen saturation

Question 2

During aerobic exercise, which muscle fiber type is recruited FIRST?

Accepted Answer

Type I (slow-twitch oxidative)

Answer

Type IIx (fast-twitch glycolytic)

Answer

Type IIa (fast-twitch oxidative-glycolytic)

Answer

Type III (intermediate)

Question 3

What is the Fick equation used to calculate?

Accepted Answer

Oxygen consumption (VO2)

Answer

Maximum lung capacity

Answer

Respiratory exchange ratio

Answer

Blood pressure during exercise

Question 4

Which of the following adaptations is a hallmark of long-term endurance training?

Accepted Answer

Increased mitochondrial density in skeletal muscle

Answer

Increased resting heart rate

Answer

Decreased stroke volume at rest

Answer

Reduced capillary density in muscle tissue

Question 5

The respiratory exchange ratio (RER) of 1.0 during steady-state exercise indicates that the body is primarily using which fuel?

Accepted Answer

Carbohydrate

Answer

Fat

Answer

Protein

Answer

A 50/50 mix of fat and carbohydrate

Question 6

What happens to systolic blood pressure during a progressive aerobic exercise test?

Accepted Answer

It increases progressively with increasing workload

Answer

It decreases progressively

Answer

It remains constant throughout

Answer

It increases then drops below resting levels

Question 7

Which of the following describes the oxygen dissociation curve shift during intense exercise?

Accepted Answer

Shift to the right, increasing oxygen release to tissues

Answer

Shift to the left, decreasing oxygen release to tissues

Answer

No shift; it remains unchanged during exercise

Answer

Shift to the left, increasing hemoglobin's oxygen affinity