Sarcomere

Q. In the resting state of muscle, the H zone is the

1. Central part of thin filament overlapped with thick filament
2. Central part of thick filament not overlapped with thin filament
3. Central part of thin filament not overlapped with thick filament
4. Central part of thick filament overlapped with thin filament

Q.

The thin filament of a myofibril is a complex of three different proteins called ___.

Q. Krause’s membrane is

1. Z – disc
2. Sarcolemma
3. T – system
4. Neuromuscular junction

Q.

Identify different regions in the structure of myofibril

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1. 1. Z disc 2. H zone 3. M line 4. A band 5. I band

2. 1. Z disc 2. H zone 3. I band 4. A band 5. M line

3. 1. Z disc 2. H zone 3. M line 4. I band 5. A band

4. 1. Z disc 2. M line 3. H zone 4. A band 5. I band

Q.

The region made of thin filaments is _______ .

1. A band

2. I band

3. Z line

4. H band

5. M Line

Q. Label the different bands and zones.

1. M Line
2. A Band
3. I Band
4. Z Disc

Q.

Thick and thin filaments form the (i)__________. The thick and thin filaments overlap and form a definite pattern that form repeating units called (ii)______.

1. (i) myofibrils (ii) sarcomere

2. (i) sarcomere (ii) myofibrils

3. (i) fascia (ii) fascicle

4. (i) fascicle (ii) fascia

Q. Assertion: Myofibrils have thick and thin myofilaments.
Reason: Thick myofilament consists of myosin. Thin myofilament constitutes of actin.

1. Both the assertion and reason are true and the reason is the correct explanation for the assertion
2. Both the assertion and reason are true but the reason is not the explanation for the assertion
3. Assertion is true but the reason is false
4. Reason is true but the assertion is false

Q.

Label x, y, and z in a sarcomere

1. I band, A band, H zone

2. H zone, A band and I band

3. I band, H zone, A band

4. H zone, I band, A band