Locomotion and Movement Test

Result

Locomotion and Movement Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Read the following statements about muscle contraction in humans :

i. chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter.
ii. a neurotransmitter acetylcholine at motor end plate converts electrical energy into mechanical energy.
iii. in a contracted muscle, volume remains the same.
iv. a contracted muscle becomes shorter and thicker.

A
onlyi) and iv) are correct.

B
only i), iii) and iv) are correct.

C
only ii), iii) and iv) are correct.

D
only iv) is correct.

Solution

The chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter. In a contracted muscle, volume remains the same and a contracted muscle becomes shorter and thicker.
Question 2
1 / -0

Which of the following statements is/are incorrect about sliding filament theory of muscle contraction?

A
during contraction width of I and A bands remain the same.

B
during contraction width of H zone decreases.

C
during contraction Z lines come closer to together.

D
both A & B

Solution

During contraction, the ‘I’ bands get reduced, whereas the ‘A’ bands retain the length.
Question 3
1 / -0

Myoglobin was the first protein to have its three-dimensional structure revealed. Ravi was diagnosed with myoglobin in his bloodstream. This had occurred due to :

A
conversion of Hb into Mb

B
myasthenia gravis

C
muscle injury

D
Arthritis

Solution

Myoglobin is an iron and oxygen binding protein found in the muscle tissue of mammals. Presence of myoglobin in blood stream may be due to muscle injury of Ravi due to accident or sudden jerk.
Question 4
1 / -0

The vertebral formula of human is :

A
C₈T₁₂L₄S₍₅₎C₍₆₎

B
C₆T₁₂L₆S₍₅₎C₍₄₎

C
C₇T₁₂L₅S₍₅₎C₍₄₎

D
C₇T₁₁L₅S₍₇₎C₍₄₎

Solution

The vertebral column is differentiated into cervical (7), thoracic (12), lumbar (5), sacral (5-fused) and coccygeal (4-fused) regions starting from the skull.