Nervous Control In Humans

Question 1

What consists of the Central Nervous System?

Answer 1

The brain and spinal cord

Question 2

What consists of the Peripheral Nervous System?

Answer 2

Cranial nerves and spinal nerves

Question 3

List the 3 nerve cells

Answer 3

-receptor; detect stimuli
-motor; transports impulses to CNS and organs
-relay; connects the two

Question 4

Examples of effector organs

Answer 4

-glands/muscles
-biceps and triceps

Question 5

What is an effector ?

Answer 5

Glands/muscles that bring about a response

Question 6

What is a synapse ?

Answer 6

The junction of 2 neurones and helps impulses flow in 1 direction

Question 7

What are vesicles?

Answer 7

They contain neurotransmitters that diffuse from the presynaptic membrane to the postsynaptic membrane

Question 8

What do the neurotransmitters do?

Answer 8

Diffuse to receptor muscles on post synaptic membrane then a new impulse is sent

Question 9

What are excitatory drugs and give an example

Answer 9

They increase activity in the CNS making it very alert e.g Amphetamines

Question 10

What are inhibitory drugs and give examples

Answer 10

They reduce the effect of neurotransmitters
E.g; heroin which acts on the presynaptic membrane to reduce effects of neurotransmitters and reduce sense of pain
Beta blockers which block receptors for neurotransmitters