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 | 
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 | 
All the following regarding red muscle fibers are true except:
| 1. | They are adapted for slow and sustained activity | 
| 2. | They have a high content of myoglobin | 
| 3. | They are rich in mitochondria | 
| 4. | They depend on anaerobic process for energy | 
The central part of the thick filaments not overlapped by the thin filaments is called as:
| 1. | A band | 2. | I band | 
| 3. | H zone | 4. | Sarcomere | 
During relaxation of a skeletal muscle:
| 1. | Calcium ions that are bound to troponin C now bind to troponin A | 
| 2. | Cross bridge formation between myosin head and actin takes place | 
| 3. | The A band of the sarcomere lengthens | 
| 4. | Calcium ions are pumped back to the sarcoplasmic cisternae | 
What type of muscles do you expect to find in the inner walls of hollow visceral organs?
| 1. | Involuntary, nonstriated | 2. | Voluntary, nonstriated | 
| 3. | Involuntary, striated | 4. | Voluntary, striated |