1
Q
what is the reflex arc
A
the pathway along which nerve impulses are carried from receptor to effector to bring about a reflex action
2
Q
parts of reflex arc
A
receptor sensory neuron interneuron motor neuron effector
3
Q
receptor
A
detects stimulus and converts it into an impulse
4
Q
sensory neuron
A
conducts the impulse from receptor to the grey matter of CNS
5
Q
what is the interneuron
A
serves as the reflex centre in the grey matter of the spinal cord
6
Q
interneuron functions
A
conducts impulse from the sensory neuron to the motor neuron
7
Q
motor neuron
A
conducts the impulse from the CNS to effector
8
Q
effector
A
responds to the original stimulus with a reflex action
9
Q
significance of the reflex arc
A
- action is rapid to protect the person from further injury
- prevents overload of higher centres of the brain
10
Q
functioning of reflex arc
A
receptors detect sensory neuron interneuron, serves as reflex arc impulse exits spinal cord, conducted to the effector effector causes reflex action
