Which of the following statements are correct regarding skeletal muscle?
A: Muscle bundles are held together by collagenous connective tissue layer called fascicle.
B: Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
C: Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
D: M line is considered as functional unit of contraction called sarcomere.

Choose the most appropriate answer from the options given below:
1. C and D only 2. A, B and C only
3. B and C only 4. A, C and D only
Subtopic:  Skeletal Muscle: Basic Anatomy | Skeletal Muscle: Myofilaments | Skeletal Muscle: Sarcomere |
 53%
From NCERT
NEET - 2023
Please attempt this question first.
Hints
Please attempt this question first.

The H-zone in the skeletal muscle fibre is due to:

1. The central gap between myosin filaments in the A-band.
2. The central gap between actin filaments extends through myosin filaments in the A-band.
3. Extension of myosin filaments in the central portion of the A-band
4. The absence of myofibrils in the central portion of the A-band.

Subtopic:  Skeletal Muscle: Sarcomere |
 60%
From NCERT
AIPMT - 2013
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Unit of contraction in a muscle fiber is:
1.  Sarcomere
2.  Muscle fiber
3.  Actin
4.  None

Subtopic:  Skeletal Muscle: Sarcomere |
 94%
From NCERT
AIPMT - 1998
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh