MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Structure

The smallest ...

Question

The smallest functional unit of a striated muscle is _____

A

Light band

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Dark band

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Myofibril

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Sarcomere

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
Sarcomere

The sarcomere is the functional contractile unit of striated muscles. It is composed of thick and thin filaments made up of contractile proteins arranged alternately to form the light band and dark band. A dark band and half of the two light bands together constitute a sarcomere.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Read the statement regarding myofibril and choose the correct option:
1. Each myofibril has alternate dark and light bands.
2. In the center of each A band is an elastic fiber called Z-line.
3. A and I bands are arranged alternately throughout the length of myofibril.
4. The sarcomere is the functional unit of contraction.
5. The central part of thick filament not overlapped by a thin filament is the M line.

Q. Sarcomere is the functional unit of contraction in a muscle fibre. Identify the portion of myofibril that constitutes a sarcomere

Q. Assertion :Assertion : The portion of the myofibril between two successive 2-lines Is considered as the functional unit of contraction oiled sarcomere Reason: Reason : During contraction, I-bands get reduced whereas A-bands retain the length, thereby causing shroting of the sarcomere

Q. Assess the statements.
1. A-bands of the muscle is dark and contain myosin.
2. I-bands are the light bands and contain actin.
3. During muscle contraction the A-band contracts.
4. The part between the two Z-lines is called as sarcomere.
5. The central part of thick filament, not overlapped by thin filament, called H-zone.
Of the above statements.

Q. During muscle contraction, which of the following shortens?
(i) A band
(ii) I band
(iii) Sarcomere

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Structure of Skeletal Muscle

BIOLOGY

Watch in App

explore_more_icon

Explore more

Standard IX Biology

Join BYJU'S Learning Program

CrossIcon