Hair present in the skin are:
Correct answer: A. Epidermal in origin and made up of dead cells
- A. Epidermal in origin and made up of dead cells
- B. Epidermal in origin and made up of living cells
- C. Dermal in origin and made up of living cells
- D. Dermal in origin and made up of dead cells
Explanation
Each hair is present in a tubular pit called hair follicle which is made up by sinking of epidermis. Living cells are present only at the base of hair i.e. in hair papilla, rest of the hair is dead and is divisible into outer cuticle, middle cortex and inner medulla.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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