Coordination and response: chemical coordination Flashcards Preview

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Flashcards in Coordination and response: chemical coordination Deck (23):
1

what is chemical coordination brought about by

hormones

2

what are hormones secreted into the blood by

special endocrine glands

3

what does adrenalin hormone prepare your body for

fight or flight

4

what controls and monitors your blood glucose concentration

pancreas

5

what hormone helps control your blood sugar concentration

insulin --> converts glucose to glycogen

6

where is the pituitary gland situated in your body

brain

7

where is your thyroid gland situated in your body

throat

8

where are your adrenal glands situated in your body

above your kidneys

9

where is your pancreas situated in your body

at the bottom of your kidneys

10

what do endocrine glands make

hormones which are released directly into the blood

11

when hormones are secreted into the blood what happens

they are carried around the body in the bloodstream to the target organs that they affect

12

explain the function of FSH secreted by the pituitary gland

stimulates egg development and oestrogen secretion in females and sperm production in males

13

explain the function of LH secreted by the pituitary gland

stimulates egg release (ovulation) in females and testosterone production in males

14

explain the function of ADH secreted by the pituitary gland

controls the water content off the blood

15

explain the function of GH secreted by the pituitary gland

speeds up the rate of growth and development in children

16

explain the function of thyroxin secreted by the thyroid gland

controls the body's metabolic rate

17

explain the function of insulin glucagon secreted by the pancreas gland

lowers/raises blood glucose

18

explain the function of adrenaline secreted by the adrenals

prepares body for physical activity

19

explain the function of testosterone secreted by the testes

controls development of male secondary sexual characteristics

20

explain the function of oestrogen secreted by the ovaries

controls development of female secondary sexual characteristics

21

explain the function of progesterone secreted by the ovaries

regulates menstrual cycle

22

what does the secretion of adrenaline do to your body:

- increases breathing rate/depth
- increases heart rate/volume sending more blood to muscles for respiration
- blood diverted from digestive system to muscles
- glycogen in liver converted to glucose in the blood
- mental awareness/speed of reaction increase --> pupils dilate
- body hair stands on ends

23

with these facts about the nervous system, give the equivalent for the hormonal control:
- electrical messages travel along neurones
- chemical messages travel across synapses
- messages travel fast
- messages usually have a rapid effect
- usually a short-lived response
- nerve impulses affect individual cells e.g. muscle cells, so have a very localised effect

- chemical messages travel in the blood
- messages are transported slightly more slowly in the blood - minutes rather than milliseconds
- only chemical messages are involved
- they often take longer to have an effect
- effects are often widespread in the body, affecting any organ or tissue with the correct receptors
-effects are often long lasting