Human Physiology: Skin Temperature Regulation

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What happens to the skin when the environmental temperature is below freezing?

It starts to sweat

It becomes dehydrated

It conserves body core heat and can result in frostbite (correct)

It starts to shiver

What happens to the arterioles when the body temperature rises?

They dilate to bring warm blood to the skin (correct)

They disappear

They stay the same

They constrict to reduce blood flow

What is the function of the hair on the body in terms of thermoregulation?

To trap a layer of heat close to the skin (correct)

To reflect sunlight

To absorb heat from the environment

To release excess heat

What is the function of sweat secretion in thermoregulation?

To allow for greater heat loss through evaporation Signup and view all the answers

What is the function of the skin in terms of sensation?

To act as a sense organ, detecting touch, temperature, and pain Signup and view all the answers

What type of nerve endings are found in the skin?

Sensory nerve endings Signup and view all the answers

What is the region called where the nail body forms?

Nail matrix Signup and view all the answers

What is the function of the lateral nail fold?

To anchor the nail body Signup and view all the answers

What is the name of the crescent-shaped region at the base of the nail?

Lunula Signup and view all the answers

What is the term for a nail fungus infection?

Onychomycosis Signup and view all the answers

What is the area called beneath the free edge of the nail?

Hyponychium Signup and view all the answers

What is the term for a nail that cuts into one or both sides of the nail bed?

Ingrown nail Signup and view all the answers

What is the hair root?

The part of the hair anchored in the follicle Signup and view all the answers

What is the function of the hair papilla?

To supply blood capillaries and nerve endings to the hair Signup and view all the answers

What determines hair texture?

The shape and structure of the cortex and medulla Signup and view all the answers

What is the outermost layer of the hair shaft?

The cuticle Signup and view all the answers

Where does hair growth begin?

At the hair matrix Signup and view all the answers

What is the composition of the external hair?

Keratinized cells Signup and view all the answers

What is responsible for the sweat being thicker and more prone to bacterial decomposition?

Organic compounds Signup and view all the answers

What is the primary active ingredient in most commercial antiperspirants?

Aluminum-based compounds Signup and view all the answers

What is the function of sebaceous glands?

To lubricate and waterproof the skin and hair Signup and view all the answers

What is produced by sebaceous glands?

Sebum Signup and view all the answers

Why do some people experience 'oily' hair if not washed for several days?

Due to the buildup of sebum Signup and view all the answers

What is the primary role of fatty acids in sebum?

To prevent water loss from the skin Signup and view all the answers

What is the most common type of cancer in people?

Skin cancer Signup and view all the answers

What is the most dangerous form of skin cancer?

Melanoma Signup and view all the answers

What is the classification of burns based on?

Extent of damages Signup and view all the answers

What happens to light-colored skin during a first degree burn?

It appears red Signup and view all the answers

What is characteristic of a first degree burn?

Painful, not blistered Signup and view all the answers

What can cause burns of the skin?

Flames, hot water or steam, sunlight, or corrosive chemicals Signup and view all the answers