Describe the term oxygen debt.

Important Questions on Locomotion and Movement

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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

MEDIUM

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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>The Mechanism of Muscle Contraction

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

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

Identify the correct statement with reference to shortening of sarcomere

MEDIUM

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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>The Mechanism of Muscle Contraction

Myoglobin helps in the transport of oxygen in _______.

MEDIUM

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

Choose the incorrect statement about muscle contraction from the following:

HARD

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

Calcium important in skeletal muscle contraction because

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

Regulatory proteins in a myofibril are

MEDIUM

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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>The Mechanism of Muscle Contraction

Which of the following is not a character of red muscle?

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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

EASY

Biology>Human Physiology>Locomotion and Movement>The Mechanism of Muscle Contraction

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