synapses and reflexes

Question 1

what is a synapse

Answer 1

1) the connection between two neurons
2) the nerve signal is transferred by chemicals which diffuse across the gap
3) these chemicals then set off a new electrical signal in the nest neuron

Question 2

what are reflexes

Answer 2

reflexes are rapid, automatic responses to certain stimuli that do not involve the conscious part of the brain - they can reduce the chance of being injured.

Question 3

what is a reflex arc

Answer 3

the passage of information in a reflex (from receptor to effector)

Question 4

what is a reflex action

Answer 4

a rapid, automatic response to a stimulus that does not involve the conscious part of the brain.

Question 5

describe the pathway of the reflex from stimulus to effector

Answer 5

. the stimulus is detected by receptors
. which send impulses along a sensory neuron to the CNS
. the impulse is transferred to a relay neuron
. it is then transferred to a motor neuron and travels along it to the effector