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The narrow light line seen within the dark band is

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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
Which type of tissue is correctly paired with its location?
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Identify the correct statement with reference to shortening of sarcomere
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Calcium important in skeletal muscle contraction because 
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.
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans

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>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?
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
Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans

How does muscle cells change their shape?

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.
HARD
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Due to constant writing, muscles of hands show fatigueness because_____.
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
In a striated myofibril, the F-actin of thin filament is formed by
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
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>Muscular System of Humans
Myoglobin helps in the transport of oxygen in _______.
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?