Anatomy & Physiology of the Skin – Final Quiz

What is the function of Keratin?

Keratin helps waterproof and protect the skin and underlying tissues from heat, light, microbes and many chemicals.
Keratin is the pigment of the skin which protects the skin from the harmful effects of sunlight.
Keratin is the protein that gives skin its tensile strength.
The epidermis is composed of stratified keratinised squamous epithelium and four principal cells.

What are the four principal cells? (Please select the four correct answers)

What is thought to be the function of Langerhans cells?

Langerhans cells interact with helper T cells in immune responses.
Langerhans cells make contact with the end of nerve cells and are thought to function in the sensation of touch.
Langerhans cells produce a substance which helps to waterproof and protect the skin and underlying tissues from heat, light, microbes and many chemicals.

What is the process of keratinisation?

The process of transportation of particulate and liquid material.
The process by which cells are continuously shed and replaced by cells which originate in the basal layer.
The process of secretion of an oily substance called sebum into the hair follicles, which helps to keep hair from drying out.

What is the dermis composed of to make it tough and elastic?

What are the two types of sweat glands? (Please select the two correct answers)

What stimulates sweat glands to produce perspiration?

The increased temperature of the blood stimulates sweat glands to produce perspiration.
Vasodilation stimulates sweat glands to produce perspiration.
An increase in metabolic rate stimulates sweat glands to produce perspiration.

The skin performs six main functions, these are: (Please select the correct answer)

Protection, regulation of body temperature, sensation, vasodilation, metabolism, non-verbal communication
Thermoregulation, protection, sensation, excretion, metabolism, supply of oxygen
Thermoregulation, protection, sensation, excretion, metabolism, non-verbal communication
Protection, perspiration, sensation, vasodilation, metabolism, non-verbal communication

Skin is a physical barrier that protects underlying tissue from… (please select three correct answers)

What is the role of melanin?

What are the elderly more prone to if the hypodermis is thinner?

Select the correct statement regarding ageing skin.

Blood supply weakens, the elastic fibres and the amount of collagen is reduced resulting in wrinkling.
Blood supply strengthens, the elastic fibres and the amount of collagen is reduced resulting in wrinkling.
Blood supply weakens, the elastic fibres and the amount of collagen is strengthened resulting in stretching.
Blood supply increases, the elastic fibres and the amount of collagen is strengthened resulting in wrinkling.

What are the nerve receptors located in the skin sensitive to?

Skin is a physical barrier that protects underlying tissues from…