lesson 6 thermoregulation

Question 1

normal human body temperature is what

Answer 1

37 degrees celcius

Question 2

your body temperature is monitored and controlled by what

Answer 2

the brain

Question 3

what do scientists call the part of the brain that your monitors and controls your body temperature

Answer 3

thermoregulatory centre

Question 4

the thermoregulatory centre contains what

Answer 4

receptors which are sensitive to the temperature of the blood

Question 5

temperature receptors are also included where

Answer 5

in the skin

Question 6

the skin sends what to the thermoregulatory centre

Answer 6

electrical neurones down sensory neurons to the thermoregulatory centre

Question 7

if your temperature gets too high, what occurs first

Answer 7

sweat glands release sweat onto the surface of the skin

Question 8

if your temperature gets too high,

what happens after your sweat glands release sweat onto the surface of your skin

Answer 8

the sweat evaporates, this takes energy from the body which cools the body down

Question 9

the body can also cool itself down by what

Answer 9

flushing

Question 10

under the surface of our skin, we have a fine network of what

Answer 10

blood capillaries

Question 11

the blood capillaries underneath our skin are supplied with what

Answer 11

blood by blood vessels deeper in the skin

Question 12

if we get too hot, what happens to the blood capillaries underneath our skin

Answer 12

the blood vessels supplying the capillaries with dilate (get wider)

Question 13

when your capillaries dilate, what do scientists call this

Answer 13

vasodilation

Question 14

because the blood vessels have dilated, this means what

Answer 14

more blood flows through the capillaries and heat can now transfer out of the blood

Question 15

after the process of vasodilation what has occured

Answer 15

the body temperature has returned to its normal level

Question 16

if your body temperature is too low, the blood vessels supplying the capillaries will what

Answer 16

constrict (become narrower)

Question 17

when your capillaries constrict, scientists call this was

Answer 17

vasoconstriction

Question 18

during vasoconstriction, what happens to the blood

Answer 18

less blood now flows through the capillaries and less heat is lost from the body

Question 19

another way we respond when our body temperature drops too low is what

Answer 19

shivering

Question 20

when we shiver, what occurs

Answer 20

our skeletal muscles contract

Question 21

to generate muscle for skeletal muscle contraction the muscle must what

Answer 21

increase their rate of respiration

Question 22

when our skeletal muscles contract, this releases what

Answer 22

heat which warms our body

Question 23

if our body temperature falls to low, we also stop what

Answer 23

sweating