4.5 TRIPLE control of body temperature Flashcards Preview

SHHS - Science - AQA Biology Trilogy > 4.5 TRIPLE control of body temperature > Flashcards

Flashcards in 4.5 TRIPLE control of body temperature Deck (16)
Loading flashcards...
1
Q

What is human body temperature?

A

37 degrees Celsius

2
Q

What is the name of the center in the brain which monitors and controls body temperature?

A

Thermoregulatory centre

3
Q

The thermoregulatory centre has structures which detect changes in the temperature of the blood flowing through the brain. what is the name of these structures?

A

Receptors

4
Q

They body must _________ energy gained and lost to maintain a constant temperature.

A

Balance

5
Q

As well a detecting changes in blood temperature, where else is information received from?

A

The skin

6
Q

Which effectors are triggered if the body temperature goes above 37 degrees?

A

Sweat glands produce sweat

7
Q

Which effectors are triggered if the body temperature drops below 37 degrees?

A

Muscles shiver

8
Q

shivering muscles and sweat producing glands work in opposing ways to sensitively maintain body temperature. What is this called?

A

Antagonistic

9
Q

What happens when you are too hot?

A
  • sweat glands produce sweat
  • blood vessels dilate
  • body hairs lie flat
  • muscles do NOT shiver
10
Q

What happens when you are too cold?

A
  • sweat glands do NOT produce sweat
  • blood vessels constrict
  • body hairs stand up
  • muscles shiver
11
Q

How does vasoconstriction help to maintain heat?

A

Blood vessels to the skin are restricted, less blood flows near to the surface of the skin so less heat is lost to the surroundings.

12
Q

How does vasodilation help to lose heat?

A

Blood vessels close to the skin dilate, more blood flows near to the surface of the skin so more heat is lost to the surroundings.

13
Q

What does dilate mean?

A

Open up

14
Q

How does sweat cool the skin surface?

A

Water in the sweat evaporates from the skin surface, this transfers energy to the environment

15
Q

What does the body temperature increase when hairs stand up?

A

Insulating air is trapped near to the skin surface, keeping heat in

16
Q

Why do shivering muscles increase body temperature?

A

Muscle contraction required respiration to occur which transfers some energy to warm the body (respiration is an exothermic reaction).

Decks in SHHS - Science - AQA Biology Trilogy Class (37):