lesson 6 how we control our body temperature

Question 1

thermoregulation is what

Answer 1

the control of our internal body temperature

Question 2

our body has to be always kept around what temperature

Answer 2

37 degrees celcius

Question 3

37 degrees celcius is the perfect temperature for what

Answer 3

our enzymes to function

Question 4

if we are below 37 degrees celcius the enzymes do what

Answer 4

start to slow down in acitivity

Question 5

if we are above 37 degrees celcius the enzymes do what

Answer 5

they start to denature

(cant work at all)

Question 6

the thermoregulatory centre is part of which part of the brain

Answer 6

hypothalamus

Question 7

the thermoregulatory centre acts as a what

Answer 7

a thermostat for our body

Question 8

most receptors are found where

Answer 8

within our skin and blood vessels

Question 9

by constantly sending information about our temperature about the thermoregulatory centre, the brain is able to figure out what

Answer 9

whether we are too hot or too cold

Question 10

if the thermoregulatory centre decides that we are too hot, then it will do what

Answer 10

send out signals to cool us back down

(vice versa for the opposite)

Question 11

in order to warm us up what do we have to do

Answer 11

conserve our heat and generate more

Question 12

to conserve our heat, what do we do

Answer 12

we constrict the blood vessels that lie near surface basket

Question 13

when we constrict the blood vessels that lie on the surface basket, this is known as what

Answer 13

vasoconstriction

Question 14

vasoconstriction means what

Answer 14

less blood flows in the surface, so less heat energy is lost to our surroundings

Question 15

we also contract what

Answer 15

our erector muscles which makes our hair stand on end

Question 16

we trap a layer of what

Answer 16

insulating air

Question 17

what does the layer of insulating air do

Answer 17

make it harder the heat to leave our skin

(helps to keep us warm)

Question 18

to generate more body heat we also what

Answer 18

shiver

Question 19

when we shiver what happens with the muscles

Answer 19

they contract automatically

Question 20

automatic muscle contraction doesn’t generate heat but it does what

Answer 20

generates a lot of respiration

Question 21

all the chemical reactants involved in the respiration result in what

Answer 21

a lot of heat energy being released in waste

(ends up warming us up)

Question 22

to cool us down what do the erector muscles do

Answer 22

they relax

Question 23

to cool us down our blood vessels do what

Answer 23

they expand

Question 24

our blood vessels expand to cool us down, otherwise known as what

Answer 24

vasodilation

Question 25

vasodilation allows what

Answer 25

more heat energy to be transferred to the surroundings

Question 26

why is more heat energy being transferred to the surroundings

Answer 26

as lots of warm blood is passing close to the skins surface

Question 27

to cool us down we also produce what

Answer 27

sweat

Question 28

sweat is what

Answer 28

a mixture of water and salt that we release onto the surface of our skin

Question 29

as sweat evaporates, what occurs

Answer 29

it takes heat energy from our body away with it

as it requires a lot of energy to evaporate water