Test 18- The skin

Question 1

Function: protection against water loss

Mechanism: ?

Answer 1

Mechanism: greasy horny layer

Question 2

Function: protection against micro-organisms

Mechanism: ?

Answer 2

Mechanism: compounds from sweat and sebaceous glands

Question 3

Function: screen from UV rays

Mechanism: ?

Answer 3

Mechanism: epidermal melanin

Question 4

Function: shield against mechanical abrasion

Mechanism: ?

Answer 4

Mechanism: increased cell division and replacement

Question 5

Function: monitoring of the environment

Mechanism: ?

Answer 5

Mechanism: nerve endings in the dermis

Question 6

Function: formation of vitamin D

Mechanism: ?

Answer 6

Mechanism: synthesis from 7-dehydrocholesterol

Question 7

Function: temperature regulation

Mechanism: ?

Answer 7

Mechanism:
• erection of hairs
• evaporation of sweat
• control of dermal blood flow

Question 8

Function: energy storage

Mechanism: ?

Answer 8

Mechanism: conversion of subcutaneous fat

Question 9

Function: excretion of mainly salt and water

Mechanism: ?

Answer 9

Mechanism: sweat production

Question 10

Function: protection against stretching

Mechanism: ?

Answer 10

Mechanism: collagen and elastin in the dermis