During contraction of muscle fibers which of the following does not happen?

1. The length of the A band gets reduced

2. The attached actin Filaments are pulled towards the centre of A band

3. The Z line attached to actin Filaments is pulled inward

4. Shortening of sarcomere

Which of the following statements is incorrect?

1. A new ATP binds and cross-bridge is broken with the next cycle of contraction

2. The process of contraction continues till the calcium ions are pumped back to the sarcoplasmic cisternae and resulting in the unmasking of actin Filaments

3. The reaction time of the fibres can vary in different muscles

4. Both 1 and 3

Repeated activation of the muscles can lead to

1. Accumulation of pyruvate due to anaerobic breakdown of glycogen

2. Accumulation of lactic acid due to anaerobic breakdown of glycogen

3. Fatigue

4. Both 2 and 3

Which of the following property cannot be attributed to white fibers?

1. Fewer mitochondria

2. Anaerobic process for energy

3. Sarcoplasmic reticulum is high

4. More quantity of myoglobin

How many ear ossicles are there in humans?

The articulation of skull with the vertebral Column is by

Human skull has how many occipital condyle?

Vertebral Column is not

Spinal cord passes through

First vertebra, help in articulation of vertebral Column with the occipital condyle are the properties of