Muscle cells ( myocytes or muscle fibers) contain specialized proteins, primarily actin and myosin, that interact to cause the cell to shorten (contract) and then return to its original length (relax). This ability is fundamental to movement in animals.
Cells of which one of the following tissues in animals undergo contraction and relaxation?
Asked in UPSC Geoscientist 2020 · Topic: Human Anatomy and Physiology (Muscular System)
More Biology questions
- Lactic acid is formed in the muscles during exercise or running. It is formed :
- The sensitive area of the human tongue to bitterness is
- A person can see near objects clearly through his eyes but cannot see distant objects clearly. The possible reason(s) for this defect could be : 1. Excessive curvature of the eye lens. 2. The eye-ball has become too small. 3. The focal length of the eye lens is too large. 4. Elongation of the eye-ball. Select the correct answer using the code given below :
- Which of the following statements for persons suffering from presbyopia is/are correct ? 1. They cannot distinguish colours. 2. It usually develops with ageing. 3. They wear either bi-focal lenses consisting of both concave and convex lenses or progressive lenses. Select the answer using the code given below :
- A colour-blind person can not differentiate between the colours ?
- The human eye forms the image of an object at its
- The change of focal length of an eye lense is caused by action of the
- Which type of image of an object is formed by eye lens on retina?