receptors Flashcards
1
Q
define the term ‘ stimulus’ ?
A
-an energy change in the environment
2
Q
define the term ‘receptor’ ?
A
- a cell that detects a change
3
Q
give an example of a receptor ?
A
- pacinian corpuscle
4
Q
state the order of action when a change in the environment is detected ?
A
stimulus —> receptor —-> coordinator —-> effector—-> response
5
Q
define the term ‘coordinator’ ?
A
- anything that makes a decision by receiving nerve impulses from the receptor
6
Q
state an example of coordinators ?
A
- the brain
- the spinal cord
(CNS)
7
Q
define the term ‘effector’ ?
A
- muscle or a gland that produces a response
8
Q
what are the 2 types of responses ?
A
- muscle contraction
- chemical release
9
Q
how do organisms increase their chance of survival?
A
- by responding to stimuli via different response mechanisms
10
Q
what is the nervous system made up of ?
A
- the peripheral nervous system
- central nervous system
11
Q
what does the PNS include ?
A
- receptors
- sensory neurones
12
Q
what does the CNS include ?
A
- the coordination centres such as the brain and spinal cord
13
Q
state the 3 key receptors ?
A
- pacinian corpuscle
- rods
- cones
14
Q
each receptor responds to … ?
A
specific stimuli
15
Q
what does the stimulation of a receptor lead to ?
A
- it leads to an establishment of a generator potential which can cause a response
