Exercise Physiology Questions and Answers

121.

Determine the sequence of events following a muscular contraction using the codes given below :

I. Uncovering of Active site of Actin filament.
II. Break down of ATP.
III. Release of calcium ions.
IV. Coupling of Actin and Myosin filaments.
V. Decrease in distance between two Z lines.
Codes :

A.IV, II, I, III, V
B.III, I, IV, II, V
C.I, II, IV, III, V
D.I, III, II, IV, V

Exam Year(s)

UGC NET - 2013,

Answer: B

The sequence is release of calcium ions, uncovering of the active site on the actin filament, coupling of actin and myosin, breakdown of ATP and a decrease in the distance between two Z lines, that is III, I, IV, II, V.

Calcium has to come first, for it uncovers the sites, and the shortening of the sarcomere comes last. The other orders put ATP breakdown or coupling before the release of calcium.

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122.

Match List-I with List-II and select the correct option from the codes given below :

List - I	List - II
I. Aldosterone	1. Protein synthesis
II. Parathyroid	2. Water balance
III. Anti dieuretic	3. C⁺⁺ regulation
IV. Steroid	4. Max VO₂
	5. Blood pressure

Codes : I II III IV

A.4 3 5 1
B.5 3 2 1
C.3 5 4 1
D.5 4 2 1

Exam Year(s)

UGC NET - 2013,

Answer: B

The matches are aldosterone with blood pressure, parathyroid with calcium regulation, antidiuretic hormone with water balance and steroid with protein synthesis, which is the code 5 3 2 1.

The other codes give water balance to aldosterone or maximum oxygen uptake to a hormone, which does not fit.

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123.

Given below are two statements, one is labelled as Assertion (A) and the other one is Reason (R).

Assertion (A) : Lactate threshold, when expressed as a percentage of VO2 max is not a best determinant of an athlete's performance.
Reason (R) : In fact lactate threshold is that point in the Intensity of exercise where lactic acid accumulation above resting level starts. Which one of the following statement is correct ?
Codes :

A.(A) is true and (R) is right explanation of (A).
B.(A) is true, but (R) is false.
C.(A) is false, but (R) is true.
D.Both (A) and (R) are true, but (R) is not right explanation of (A).

Exam Year(s)

UGC NET - 2013,

Answer: C

The assertion is false and the reason is true. The lactate threshold as a percentage of VO2 max is considered a good determinant of endurance performance.

The reason is true, since the lactate threshold is the point at which lactic acid starts to accumulate above the resting level.

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124.

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A) : The oxygen dissociation curve is affected by the increase in temperature and hydrogen (H+) ion concentration in the exercising muscle.
Reason (R) : This results in lesser unloading of oxygen in the exercising muscles. Which of the following statement is correct ?
Codes :

A.(A) is true and (R) is right explanation of (A).
B.Both (A) and (R) are true, but (R) is not right explanation of (A).
C.(A) is true, but (R) is false.
D.Both (A) and (R) are not true.

Exam Year(s)

UGC NET - 2013,

Answer: C

The assertion is true and the reason is false. A rise in temperature and in hydrogen ion concentration moves the oxygen dissociation curve to the right.

This results in more unloading of oxygen in the exercising muscles and not less, so (R) is wrong.

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125.

Given below are two statements, one is labelled as Assertion (A) the other as Reason (R).

Assertion (A) : The distribution of blood in body parts depends upon the immediate needs of a specific tissue and of other tissues as a whole.
Reason (R) : At rest under normal conditions, the liver and kidneys combined receives nearly 75% of the total blood supply. Which of the following statement is correct ?
Codes :

A.(A) is true and (R) is right explanation of (A).
B.Both (A) and (R) are true, but (R) is not right explanation of (A).
C.(A) is true and (R) is false.
D.(A) is false and (R) is true.

Exam Year(s)

UGC NET - 2013,

Answer: C

The assertion is true and the reason is false. The blood is shared among the organs according to the needs of the tissue and of the body as a whole.

At rest the liver and kidneys together receive about a third or so of the supply and not 75 percent, so (R) is false.

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126.

The classification of body types as Endomorphs, Mesomorphs and Ectomorphs is given by

A.Kretchmer
B.Sheldon
C.Plato
D.Aristotle

Exam Year(s)

UGC NET - 2014,

Answer: B

The classification into endomorph, mesomorph and ectomorph was given by W. H. Sheldon, an American psychologist, in his system of somatotyping from the 1940s. He rated every person on three components: fatness and softness (endomorphy), muscularity and bone (mesomorphy) and linearity and fragility (ectomorphy). Kretschmer, a German psychiatrist, had earlier proposed a different scheme of pyknic, athletic and asthenic types, while Plato and Aristotle belong to ancient philosophy and gave no body typology of this kind.

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127.

Human Heart is

A.An enzyme factory
B.A great pumping organ
C.Source of Inspiration
D.An Energy House

Exam Year(s)

UGC NET - 2014,

Answer: B

The human heart is a great pumping organ. It is a muscular organ that contracts rhythmically to drive blood through the lungs and the body, about five litres every minute at rest. It is not an enzyme factory, which would describe organs such as the pancreas or liver that make enzymes. Calling it a source of inspiration or an energy house is figurative language, and the physiological description of its function is that of a pump.

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128.

Which of the following is known as the building blocks of the body ?

A.Proteins
B.Carbohydrates
C.Vitamins
D.Minerals

Exam Year(s)

UGC NET - 2014,

Answer: A

Proteins are known as the building blocks of the body. They are made of amino acids and are needed to build and repair muscles, enzymes, hormones and tissues. Carbohydrates are the main source of quick energy, vitamins regulate metabolic processes in small amounts without giving energy, and minerals take part in bone structure and body regulation, so none of them is called the building block in the way that proteins are.

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129.

Use the correct code given below : Arrange the organs of Respiratory system in descending order.

I. Nose
II. Larynx
III. Trachea
IV. Lungs
Codes :

A.I, II, IV, III
B.IV, III, II, I
C.II, III, IV, I
D.I, II, III, IV

Exam Year(s)

UGC NET - 2014,

Answer: D

The organs in order along the respiratory path, in descending order from top to bottom, are nose, larynx, trachea and lungs (I, II, III, IV). Air enters through the nose, passes the larynx, goes down the trachea and reaches the bronchi and lungs. Any code that places the lungs before the trachea or starts with the lungs reverses the order of the passage. Remember the direction as the passage of the inspired air, from the outside of the body inwards, since the question asks for the order in which the organs are met.

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130.

Match List - I with List - II and select the correct answer from the codes given below :

List - I	List - II
I. Neuron	1. Digestive system
II. Alveoli	2. Urinary system
III. Nephrone	3. Respiratory system
IV. Villi	4. Nervous system

Codes : I II III IV

A.1 3 4 2
B.4 3 2 1
C.2 1 3 4
D.1 2 3 4

Exam Year(s)

UGC NET - 2014,

Answer: B

The matching is neuron with the nervous system (4), alveoli with the respiratory system (3), nephron with the urinary system (2) and villi with the digestive system (1), the code 4, 3, 2, 1. The neuron is the unit of the nervous system, alveoli are the air sacs of the lungs where gas is exchanged, the nephron filters blood in the kidney, and villi in the small intestine absorb digested food. The other codes mismatch at least two pairs.

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