EASY
Earn 100

Arrange the following statements in correct sequence to describe muscle contraction.

1. Signal sent by CNS through motor neuron.

2. Generation of action potential in the sarcolemma.

3. Release of Ca+2 from sarcoplasmic reticulum.

4. The neurotransmitter acetylcholine is released from motor end plate.

5. Sarcomere is shortened.

100% studentsanswered this correctly

Important Questions on Locomotion and Movement

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

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
Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:
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 ________.
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Myoglobin helps in the transport of oxygen in _______.
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Choose the incorrect statement about muscle contraction from the following:
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Regulatory proteins in a myofibril are
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
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
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 is not a character of red 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
When muscle contraction occurs in the body, all the following events occur, except:
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Dimensions of which of the following remains unaffected when skeletal muscle fibres are in maximally contracted state?
EASY
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
The correct order of the structure/layer in a muscle from inside to outside.
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
Read the given features.
a. Absence of sarcomere
b. Presence of nucleus
c. Syncytial appearance
d. Presence of gap junctions
Choose the option that reflects features of muscle fibres located in inner walls of reproductive tract.
MEDIUM
Biology>Human Physiology>Locomotion and Movement>Muscular System of Humans
Red muscle fibres differ from white muscle fibres as