Which of the following movements can be seen in a human body?
I. Amoeboid | II. Ciliary | III. Flagellar |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
ATPase activity is found in:
1. | Myosin head | 2. | Myosin tail |
3. | G-Actin | 4. | Troponin |
Skeletal muscles are:
1. | Striated, Multinucleate and Voluntary |
2. | Non-Striated, Multinucleate and Voluntary |
3. | Striated, Multinucleate and Involuntary |
4. | Non-Striated, Uni-nucleate and Voluntary |
With respect to the red muscle fibers [Type I], the white muscle fibers [Type II] are richer in:
1. | Blood capillaries | 2. | Myoglobin |
3. | Sarcoplasmic reticulum | 4. | Mitochondria |
The smallest, functional unit of contraction is the:
1. | muscle fiber | 2. | sarcomere |
3. | myofilament | 4. | myofibril |
A motor neuron along with all the muscle fibers innervated by it constitute a:
1. | Fascicle | 2. | Motor end plate |
3. | Motor unit | 4. | Myoneural junction |
During muscle contraction, the part that does not get shortened in length is labeled as the letter:
1. A | 2. B |
3. C | 4. D |
Consider the following statements:
I: | The head of myosin is made of LMM and the tail is made of HMM |
II: | F Actin is monomeric while G actin is polymeric |
III: | Tropomyosin is composed of three globular proteins |
The incorrect statements are:
1. I and II only | 2. I and III only |
3. II and III only | 4. I, II and III |
A | B | C | D | |
1. | I band | A band | H zone | M line |
2. | I band | H zone | M line | Z line |
3. | A band | I band | Z line | M line |
4. | H zone | I band | M line | Z line |
As the distance from Z line to Z line decreases, which bands shorten in a sarcomere?
1. | the I band and H band | 2. | the I band and A band |
3. | the A band and H band | 4. | all bands shorten |