5. Pacinian corpuscles are sensitive to 6. The outermost layer of the epidermis

Question

5. Pacinian corpuscles are sensitive to 6. The outermost layer of the epidermis is the 7. New cells of the epidermis originate in the 1. temperature. 2. pressure. 3. touch 1. stratum corneum. 3. stratum lucidum. 2. stratum basale. 4. stratum spinosum. 1. dermis. 3. stratum corneum 2. stratum basale. 4. stratum lucidum. 8. Melanin granules are produced by the 1. stratum granulosum. 2. melanocytes. 3. stratum lucidum. 4. strarum corneum. 9. The secretions of the apocrine glands usually empty 1. into a hair follicle. 3. Both 1 and 2, 2. directly out through the skin surface. 4. None of these is correct. 10. Sebum is secreted by 1. sweat glands. 3. apocrine glands. 2. eccrine glands. 4. None of these is correct. 11. Keratin's function is primarily to 1. destroy bacteria. 2. provide waterprooing. 3. cool the body. 12. Meissner's corpuscles are located in the 1. papillary layer. 2. reticular layer. 3. subcutaneous layer. 13. Arrector pili assist in 1. maintaining skin tonus. 2. limiting excessive sweating. 3. forcing out sebum. 4. None of these is correct 14. The hair follicle is 1. a shaft of hair. 3. a tube in the skin. 4. a glandular structure. L. papillary layer 2. reticular layer. 3. subcutaneous 1. sebaceous glands. S. ceruminous glands. 4. None of these is correct. 2. the root of a hair. 15. Pacinian corpuscles are loeated in the 16. Sweat is produced by eccrine glands. 17. The coiled-up portion of an apocrine gland is located in the 1. epidermis 3. subcutaneous layer.4. hair follicle. 2. dermis. 18. Apocrine glands are located 1. in the axiilae. 2. in the esr canal. 2. on the scrotum. 4. All of these are correct.

Explanation / Answer

Q5) Pacinian corpuscles are sensitive to-

Answer- 2-Pressure.

Explanation- Skin contains many sensory receptors. Pacinian corpuscles are found in skin they are onion-like structures in the dermis and hypodermis. They contain a myelinated nerve ending in the central part of the structure. The outer layers are composed of flattened cells, collagen fibers and a lymph-like fluid. They are sensitive to mechanical and vibratory pressure.

Q6) The outermost layer of epidermis is-

Answer- 1-Startum corneum .

Explanation- Stratum corneum is the outermost layer of epidermis, it is a cornified layer.made up of 10 to 30 layers of polyhedral, anucleated corneocytes.

Q7) New cells of epidermis originate in the-

Answer- 2-Stratum basale.

Explanation- The basal cell layer (stratum basale, or stratum germinosum), is a single layer of cells, found closer to the dermis. In this layer the cells divide.

Q8) Melanin granules are produced by-

Answer- 2- Melanocytes.

Explanation- Melanocyte, are special skin cell , which produces the protective skin-darkening pigment called melanin.

Q9) secretion of apocrine gland usually empty -

Answer- 1- into a hair follicle.

Q10) Sebum is secreted by-

Answer-4 - none of these.

Explanation- sebum is secreted by sebaceous glands.

Q11) Keratin's function is primarily to-

Answer- 2- Provide water proofing.

Explanation- Cells in the epidermis contains a structural matrix of keratin, it makes this outermost layer of the skin  waterproof.

Q12) Meisner's corpuscles are located in the-

Answer-1 - papillary layer.

Explanation- Meisner's corpuscles are distributed on various areas of the skin, but concentrated in areas which are sensitive to light and touch, like fingers and lips.They are primarily located in glabrous skin just below the the epidermis within the dermal papillae.

Q13) Arrector pilli assists in-

Answer- 4 - none of the above.

Explanation- Arrector Pili Muscle is a small muscle which attaches the base of a hair follicle at one end and the dermal tissue on the other end. It generate heat when the body is cold.

Q14)Hair follicle is a-

Answer- Tube in the skin.

Explanation- hair follicle is a tube-shaped sheath which surrounds the part of the hair that is under the skin and nourishes the hair.

Q15) Pacinian corpuscles are located in -

Answer- 3- Subcutaneous layer.

Explanation-  Pacinian corpuscles are mechanoreceptors found in the dermis or subcutaneous layer of the fingers, breasts, external genitalia, bladder.

Q16)Sweat is produced by-

Answer- 2- eccrine glands.

Explanation- Two types of sweat glands are found in humansthey are eccrine glands and apocrine glands. Eccrine sweat glands are distributed in many areas of the body.

Q17) The coiled portion of an apocrine gland is located in the-

Answer- 2- Dermis.

Explanation- coiled secretory portion, is present in the lower part of the reticular dermis or in the subcutaneous fat.

Q18) Apocrine glands are found in the-

Answer- 4- all of them are correct.

Explanation- Apocrine glands are  found in axillae ( or armpits), areola and nipples of the breast, ear canal, eyelids, wings of the nostril, perianal region, and some parts of the external genitalia.

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