SB2i: Neurotransmission Speeds Keywords

Question 1

Effector

Answer 1

Muscle or gland in the body that performs an action when an impulse from the nervous system is received.

Question 2

Motor neurone

Answer 2

Neurone that carries impulses to effectors.

Question 3

Neurotransmitter

Answer 3

Substance that diffuses across the gap between two neurones at a synapse, and triggers an impulse to be generated in the neurone on the other side of the synapse.

Question 4

Reflex

Answer 4

Response to a stimulus that does not require processing by the brain. The response is automatic. Also called a reflex action.

Question 5

Reflex arc

Answer 5

Neurone pathway consisting of a sensory neurone passing impulses to a motor neurone (often via a relay neurone), which allows reflexes to occur.

Question 6

Relay neurone

Answer 6

A short type of neurone, found in the spinal cord and brain. Relay neurones link with sensory, motor and other relay neurones.

Question 7

Synapse

Answer 7

Point at which two neurones meet. There is a tiny gap between neurones at a synapse, which cannot transmit an electrical impulse.