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The largest muscle in the human is

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Important Questions on Locomotion and Movement

MEDIUM

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

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.

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Which one of the following proteins does not play a role in skeletal muscle contraction?

HARD

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

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.

HARD

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Calcium important in skeletal muscle contraction because

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:

MEDIUM

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Choose the incorrect statement about muscle contraction from the following:

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Myoglobin helps in the transport of oxygen in _______.

MEDIUM

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Assertion (A): Light meromyosin and Heavy meromyosin are often called regulatory proteins.
Reason (R): The above said molecules have a role in masking and unmasking the active sites on actin.

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Regulatory proteins in a myofibril are

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Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Identify the correct statement with reference to shortening of sarcomere

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Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Assertion (A): Skeletal muscles have very limited power of regeneration.

Reason (R): Satellite cells are present in them.

The correct option among the following is

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

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>Types of Movement in Animals

Statement I: T- tubule of muscle fibre and the two terminal cisternae at its sides from the triad system
Statement II: Actin is a motor protein that is able to convert chemical energy into mechanical energy

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

The part of sarcomere that contains both thick and thin filaments are present in ________.

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

In a striated myofibril, the F-actin of thin filament is formed by

HARD

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

How does muscle cells change their shape?

EASY

Biology>Human Physiology>Locomotion and Movement>Types of Movement in Animals

Which of the following will NOT be triggered by the release of acetylcholine in the synapse at the neuromuscular junction during muscle contraction?