Edexcel IGCSE Biology 2.82 Stimulus, receptor & effector
Practise linking stimulus, receptor and effector in coordinated responses, using simple pathways to show how organisms respond.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
2.82 Stimulus, receptor and effector question 1
The diagram shows a human reflex arc with some structures labelled. It is the withdrawal reflex, which allows a person to remove their hand from a hot object quickly.
Question (a)
(a)
Which structure is the sensory receptor?
A
L
B
P
C
Q
D
S
[ 1 ]
Question (b)
(b)
Which structure is the effector?
A
L
B
M
C
Q
D
S
[ 1 ]
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