Question

13). How do merocrine & apocrine sweat glands differ in their structure and in their function? Explain.

14). It is important for the epidermis to be effective at screening UV radiation, but not to be too effective. Explain.

15). Your patient asks you which cell type in the skin is the most important cell and why? How would you reply? Explain.

16). Describe the stages of intramembranous ossification and name at least one (1) bone that is formed using this process.

Answer 1

Difference between Merocrine and apocrine sweat glands

Apocrine Sweat gland

• Apocrine gland secrete sweat in piliary canal of hair folicle.
• The secretory region is larger in apocrine than the merocrine gland.
• Before puberty, it remains inactivated.
• It is more activated in stress and sexual pleasure.
• The secreted substance is thicker than the merocrine secretion and bacteria get nutrient from this .
• it is present in areola,armpit,perinum,ear and eyelid .
• It's secretion contains pheromones compound to attract within same species.

Merocrine gland

• It is smaller than the apocrine ,open directly at skin and doesn't extend in dermis deeply through duct.
• The secrete of merocrine gland is sweat contains electrolyte
• It decreases with growing age.
• Secretion is hormonally and neurally conytrolled.
• It helps in thermoregulation,excretion and protection from pathogens or bacteria.
• It is present all over the body surface except lips,glans penis,clitoris and labia minora.