Possible Final Questions Ex-Phys

Which of the following proteins blocks the binding site between actin and myosin?

Tropomyosin

Exercise is defined as

Planned and structured activity done to improve physical fitness

Sensory receptors that protect skeletal muscle from excessive loads or forces

Golgi tendon organs

In the parasympathetic system BLANK will cause an BLANk in heart rate

Acetylcholine; decrease

A single alpha motor neuron and all the muscle fibers it innervates is called a

Motor unit

The BLANK is the functional unit of a muscle fiber

Sarcomere

Maximal exercise lasting for 60 sec relies mostly

Glycolytic system

Which one of the following is the only substrate that can generate ATP anaerobically?

Glucose

A method for comparing oxygen use by the body during exercise with the amount used at rest is:

Metabolic Equivalents (METS)

Which of the following does NOT contribute to a high capacity for aerobic exercise? A high ....

Basal Metabolic Rate (BMR)

Which of the following is a limitation of using fat as a fuel during exercise? Fat ....

provides energy too slowly to support vigorous exercise

During aerobic exercise, systolic blood pressure BLANK and diastolic blood pressure BLANK

significantly increases; stays the same or decreases

An important mechanism for increasing venous return to the heart is activation of the ....

muscle-venous pump in exercising muscles

All of the following contribute to increased cardiac output during exercise, EXCEPT

Vasodilation of the veins

In healthy individuals, which respiratory measure is an important determinant of aerobic performance?

Ventilatory Threshold

The ventilatory threshold occurs when breathing begins to increase rapidly. What is the cause?

Accumulation of lactate in the blood

Which of the following is the main regulator of pulmonary ventilation during exercise?

Central command centers in the brain