Homeostasis Flashcards
1
Q
Central nervous system
A
Brain
Spinal chord
2
Q
Stimulus…
A
Receptor, coordination, effector, response
3
Q
Nerve cell
A
Neurone
4
Q
Bundle of neurones
A
Nerve
5
Q
How do synapses work?
A
Chemical transmitters are released
They diffuse across the gap
They bind to the receptors in the membrane
A new impulse starts
6
Q
Reflex arc
A
stimulus receptor sensory neurone relay neurone motor neurone effector response
7
Q
what happens to the eye in bright light?
A
- circular muscles contract
- pupil becomes smaller
8
Q
what happens to the eye in dim light?
A
- radial muscles contract
- pupil becomes larger
9
Q
looking at distant objects:
A
- ciliary muscles relax
- suspensory ligaments pull tight
- the lens goes thin
10
Q
looking at near objects:
A
- ciliary muscles contract
- suspensory ligaments slacken
- the lens becomes fat
11
Q
where are hormones produced?
A
in glands
12
Q
where is ADH produced?
A
in the pituitary gland
13
Q
what is the role of ADH?
A
controls water content
14
Q
what are the effects of ADH?
A
increases the permeability of the kidney tubules to water
15
Q
where is adrenaline produced?
A
in the adrenal glands
