LEC Ch 5 - Integumentary System

Question 1

integumentary system consists of what?

Answer 1

skin, hair, sweat & oil glands, nails, sensory receptors

Question 2

what does the integumentary system do?

Answer 2

regulates body temp, stores blood, protects from external environment, detects cutaneous sensation, excretes and absorbs substances, and synthesizes vitamin D

Question 3

what are the 4 cell types in the epidermis?

Answer 3

1. keratinocytes (produces keratin for protection)
2. melanocytes (produces melanin that contributes to skin color)
3. langerhans (arise from red bone marrow, participates in immune response)
4. merkel (sensation of touch)

Question 4

where are epidermal ridges?

Answer 4

on surface of palm, fingers, soles and toes. (allows grip)

Question 5

what are the 2 regions of the dermis?

Answer 5

1. papillary (top 20% of dermis, thin collagen and course elastic)
2. reticular (bottom 80% of dermis, thick collagen and course elastic. also packed with oil glands, sweat ducts, fat and hair follicles)