Locomotion and Movement(Types of Movement- Ciliary, Fiagellar, Muscular; Skeletal Muscle- Contractile Proteins and Muscle Contraction,...) NEET Questions

Biology - Human Physiology

Locomotion and Movement(Types of Movement- Ciliary, Fiagellar, Muscular; Skeletal Muscle- Contractile Proteins and Muscle Contraction,...) MCQ Questions


13.
The functional unit of contraction in a muscle fiber is:
A.
Myofibril
B.
Sarcomere
C.
Myofilament
D.
Sarcoplasmic reticulum
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ANSWER :
B. Sarcomere
14.
Which of the following joints allows for rotational movement?
A.
Pivot joint
B.
Hinge joint
C.
Saddle joint
D.
Ball and socket joint
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ANSWER :
A. Pivot joint
15.
Muscular dystrophy is a group of genetic disorders characterized by:
A.
Progressive muscle weakness and degeneration
B.
Joint inflammation
C.
Bone fragility
D.
Nerve damage
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ANSWER :
A. Progressive muscle weakness and degeneration
16.
The primary function of ciliary movement in the human respiratory tract is to:
A.
Absorb oxygen
B.
Clear mucus and debris
C.
Facilitate gas exchange
D.
Detect odors
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ANSWER :
B. Clear mucus and debris
17.
During muscle contraction, which bands shorten?
A.
A-band
B.
I-band and H-zone
C.
Both A-band and I-band
D.
None of the above
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ANSWER :
B. I-band and H-zone
18.
Tetany is a condition characterized by:
A.
Muscle relaxation
B.
Sustained muscle contractions
C.
Joint stiffness
D.
Bone fractures
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ANSWER :
B. Sustained muscle contractions