How does a ‘terminal’ hair originate & grow? How does a nail originate & grow? W

Question

How does a ‘terminal’ hair originate & grow? How does a nail originate & grow? What is the difference between a sebaceous follicle and a sebaceous gland? What is the difference between an apocrine sweat gland and a merocrine (eccrine) sweat gland? Which glands are associated with a hair follicle? Are these glands classified as exocrine or endocrine? Which type of gland results in the destruction of the cell when the product is released? How is this cell replaced? Which type of gland loses a portion of the cytoplasm when the product is released? Is this cell destroyed or can it be repaired? Which type of gland releases the product by exocytosis? Where/what is the arrector pili muscle? Is it under voluntary control? What are myoepithelial cells? What is the function?

Explanation / Answer

Terminal hair are the thick, strong, pigmented hair which is modified vellus hair with effect of androgen hormones. It grows after puberty mainly on pubic area, armpit etc. Nail are grows from little pocket at the out of the fingers ends. Sebaceous follicles are the glands which directly opens on the surface of the skin where as sebaceous glands are the glands that opening into the hair follicle ( not directly on to the surface) glands that opens directly on to the surface of skin called eccrine glands whereas glands that are opens to the follicles of hair called apocrine glands. Sebaceous glands are associated with hair follicle. These are the exocrine glands. Because they are directly opens on the target site rather than to the dusts and bloodstream to reach target organs. Sweat glands releases the product by exocytosis. Exocytosis is the membrane bound secretory vesicles that produces its secretions on to the extracellular environment. Arrector pili muscle are the muscles that connected to the sebaceous glands. It plays a major role in thermoregulation and secretion of sebum.

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.