The Nervous System Flashcards
1
Q
What do receptors do
A
Detect stimuli
Changes in the environment
2
Q
What are receptors in the eye sensitive to
A
Light
3
Q
What are receptors in the ear sensitive to
A
Sound
4
Q
What are the receptors in the ears also sensitive to
A
Changes in position enabling us to keep our balance
5
Q
What are receptors on the tongue and nose sensitive to
A
Chemicals enabling us to taste and smell
6
Q
What are receptors in the skin sensitive to
A
Touch, pressure , pain and temp changes
7
Q
What do light receptor cells have
A
Nucleus
Cytoplasm
Cell membrane
8
Q
What happens in a reflex action?
A
Stimulus detected by receptors, Impulse travel along sensory neurone Reach synapse Triggers chemicals Impulses sent along relay neurone Reach synapse Triggers chemicals Impulses travel along motor neurone To the effector (muscle or gland) Then response
9
Q
What does the nervous system enable
A
Humans to react to their surroundings and coordinate their behaviour
