EASY
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Go through the following diagram describing muscle contraction. Identify the parts from A to D.

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Important Questions on Locomotion and Movement

MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Choose the incorrect statement about muscle contraction from the following:
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans

During muscular contraction which of the following events occur?
(a) 'H' zone disappears
(b) 'A' band widens
(c) 'I' band reduces in width
(d) Myosin hydrolyzes ATP, releasing the ADP and Pi
(e) Z-lines attached to actins are pulled inwards.

Choose the correct answer from the options given below.

EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
The part of sarcomere that contains both thick and thin filaments are present in ________.
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Calcium important in skeletal muscle contraction because 
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Identify the correct statement with reference to shortening of sarcomere
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Which of the following statements about muscles are correct?
(i) Muscles show three essential properties such as excitability, conductivity and contractility.
(ii) Muscular tissue is endodermal in origin except muscle of iris and ciliary body.
(iii) The cytoplasm of muscle fibre has several myofibrils.
(iv) Skeletal muscles exhibit slow and prolonged contractions.
(v) The regular arrangement of myosin and actin filaments is responsible for alternate dark and light bands of striated muscle.
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Sliding filament theory can be best explained as:
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Arrange the following in a sequence from edge to centre in a sarcomere.
A) M-line
B) Z-line
C) H-zone
D) I-band
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Which one of the following proteins does not play a role in skeletal muscle contraction?
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Myoglobin helps in the transport of oxygen in _______.
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Regulatory proteins in a myofibril are
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Which of the following is not a character of red muscle?
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
During muscle contraction:
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Select the true statement.
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
All of the following are correct w.r.t. smooth muscles except
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Which of these events does not occur at neuromuscular junction of skeletal muscle on stimulation?
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans

Muscle pump is :-

MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
The contractile protein of skeletal muscle involving ATPase activity is :-