B3.3.1

Question 1

At what temperature does the body work best at and why

Answer 1

It works best at 37 degrees as this is the optimum temperature for enzymes to work at

Question 1

What is the hypothalmus responsible for

Answer 1

The hypothalmus is responsible for regulating body temperature. It relies on signals from external sensors and internal sensors. When a change is detected a response is done by sending impulses to effectors. The responses then return the body to its normal temperature.

Question 2

What happens when your body is too hot

Answer 2

.Hairs lie flat this preventing an insulating layer of air being trapped around the body
.Swear glands produce sweat. The sweat evaporates and energy is transferred from your body to the environment. Decreases the temperature of it.
.Capillaries near surface of the skin widen (vasodilation) increases blood flow through capillaries -> a decreased temperature

Question 3

What happens when your body is too cold

Answer 3

.Body hairs rise trapping a layer of air close to skin insulating the body
.Sweat glands stop producing sweat
.Blood vessels supplying capillaries near surface of your skin narrows (vasoconstriction). Decreases blood flow through capillaries decreasing heat loss
.Shivering begins causing muscles to contract and relax quickly. Cells respire quickly transferring extra energy by heating