Anatomical Aspects of Exercise Physiology Practice Questions

Question 1

Golgi tendon organ function is?

Accepted Answer

Detects the muscle tension

Answer

Detects the dynamic change in muscle length

Answer

Detects the muscle stretch

Answer

Detects the muscle strength

Question 2

Arrange the following parts of sarcomere from periphery to center.

1. Z line
2. M line
3. A band
4. H zone

Accepted Answer

1,3,4,2

Answer

2,3,4,1

Answer

4,2,3,1

Answer

3,1,4,2

Question 3

During heavy exercise the cardiac output (CO) increases up to five fold while pulmonary arterial pressure rises very little. This physiological ability of the pulmonary circulation is best explained by

Accepted Answer

Increase in the number of open capillaries

Answer

Large amount of smooth muscle in pulmonary arterioles

Answer

Sympathetically mediated greater distensibility of pulmonary vessels

Answer

Smaller surface area of pulmonary circulation

Question 4

During exercise in physiological limits, what is the effect on end systolic volume?

Accepted Answer

ESV decreases

Answer

ESV increases

Answer

ESV first decreases and then increases

Answer

ESV remains unchanged

Question 5

Least useful for a 800-m run in a competitive event would be

Accepted Answer

Lohmann reaction

Answer

Pale muscle fibres

Answer

Muscle glycogen

Answer

Oxidative phosphorylation

Question 6

During a 100 m sprint which of the following is used by the muscle for meeting energy demands?

Accepted Answer

Phosphocreatine

Answer

Phosphofructokinase

Answer

Glucose 1 - phosphate

Answer

Creatine phosphokinase

Question 7

What is a key difference between smooth muscle and skeletal muscle physiology?

Accepted Answer

Troponin is absent in smooth muscle.

Answer

Calcium is required for contraction.

Answer

Myosin is essential for contraction.

Answer

Potassium is required for contraction.

Question 8

Which of the following is the constituent of the marked area in the given electron microscope picture of the muscle?

Accepted Answer

$\alpha$-actinin

Answer

Nebulin

Answer

Titin

Answer

Tropomodulin

Question 9

A 28-year-old woman undergoes excision of an enlarged lymph node in the posterior triangle of the neck. Two weeks post-operatively she is unable to shrug her left shoulder. Nerve conduction studies confirm injury to the arrowed nerve (Image 1) as well as a separate injury to the long thoracic nerve, accounting for a newly noted winged scapula on the ipsilateral side. Which of the following best explains why TWO distinct nerve injuries are required to account for both motor deficits observed in this patient?

Accepted Answer

D. The arrowed nerve (CN XI) supplies only the trapezius and sternocleidomastoid; serratus anterior is innervated exclusively by the long thoracic nerve (C5–C7), so injury to both nerves is necessary to produce the combined deficit of shoulder-shrug weakness and winged scapula

Answer

A. The arrowed nerve supplies both the trapezius and the serratus anterior, travelling superficially across the posterior triangle before piercing the deep cervical fascia

Answer

B. The arrowed nerve supplies the trapezius directly and communicates with the long thoracic nerve within the posterior triangle, jointly innervating serratus anterior

Answer

C. The arrowed nerve supplies the trapezius, and a separate branch arising at the same level in the posterior triangle independently innervates serratus anterior

Question 10

When forces are applied on the lateral surface of the mandibular angle region, compression is generated on:

Accepted Answer

Lateral surface

Answer

Medial surface

Answer

Superior surface

Answer

Inferior surface

Anatomical Aspects of Exercise Physiology — MCQs

Anatomical Aspects of Exercise Physiology — MCQs

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