Coordination and response

Question 1

What is coordination and response

Answer 1

organisms detect and react to changes to survive using the nervous and endocrine systems

Question 2

Homeostasis

Answer 2

the maintenance of a constant internal environment

Question 3

Examples of homeostasis

Answer 3

body temperature blood sugar and water balance

Question 4

Why homeostasis matters

Answer 4

keeps the body working well by maintaining stable conditions for processes like enzyme activity

Question 5

Body temperature regulation

Answer 5

keeping the body around 37°C for enzymes to work properly

Question 6

Water content regulation

Answer 6

kidneys filter water sweat cools the body

Question 7

Co-ordinated response

Answer 7

needs a stimulus (change) a receptor (detects it) and an effector (carries out the response)

Question 8

Stimulus

Answer 8

a change like heat light or sound

Question 9

Receptor

Answer 9

detects the stimulus like eyes for light or skin for temperature

Question 10

Effector

Answer 10

does the response like muscles moving or glands releasing hormones

Question 11

Skin’s role in temperature regulation

Answer 11

sweating vasoconstriction and vasodilation

Question 12

Vasodilation

Answer 12

blood vessels near surface widen to release heat and cool the body

Question 13

Vasoconstriction

Answer 13

blood vessels near surface narrow to conserve heat

Question 14

Sweating

Answer 14

sweat glands release water cooling the body as it evaporates
latent heat of evaporation

Question 15

Sweating and cooling

Answer 15

evaporation of sweat takes heat away cooling you down

Question 16

How does our body warm up

Answer 16

Vasoconstriction
Contract erector muscles
Shivering

Question 17

How does our body cool down

Answer 17

vasodilation
Relax erector muscles
Sweating

Question 18

How does shivering warm us up?

Answer 18

muscles contract rapidly - this doesn’t generate heat itself
respiration used to generate energy - exothermic reaction

Question 19

Hypothalamus

Answer 19

brain area controls body temperature triggering responses like sweating or shivering

Question 20

Nervous system in temperature regulation

Answer 20

thermoreceptors detect temperature changes and send signals to the hypothalamus for a response

Question 21

Thermoreceptors

Answer 21

sensors that detect temperature changes and tell the brain to act

Question 22

Why temperature regulation matters

Answer 22

enzymes work best at a steady 37°C too hot or too cold messes it up

Question 23

Effectors’ response to temperature

Answer 23

muscles and glands shiver or sweat to regulate body temperature