nervous system and reflexes

Question 1

What are the 5 main areas of the brain stem?

Answer 1

Cervicial, thoracic, lumbar, sacral

Question 2

3 main areas of the reflex arc

Answer 2

receptors, spinal chord, effectors

Question 3

what is the afferent response?

Answer 3

when neurones carry signals from the stimulus to the spinal chord

Question 4

what is the efferent response

Answer 4

when neurones carry signals from the spinal cord to the muscles or glands ( effectors)

Question 5

For contraction of muscles to occur what must happen in the relay system?

Answer 5

the motor neuron must be switched on

Question 6

for relaxation to occur what must happen to the motor neuron

Answer 6

it must be switched off

Question 7

how many pairs of cranial nerves does the peripheral nervous system have

Answer 7

12

Question 8

how many pairs of spinal nerves does the peripheral nervous system have

Answer 8

31

Question 9

What does a chemoreceptor detect

Answer 9

chemicals

Question 10

what does a photoreceptor detect

Answer 10

light

Question 11

what does a thermoreceptor detect

Answer 11

temperature

Question 12

what does a nociceptor detect

Answer 12

damage to the skin

Question 13

what does a mechanoreceptor detect

Answer 13

mechanical (tubes/ joints)

Question 14

what does a baroreceptor detect

Answer 14

pressure in blood vessels

Question 15

what is stimuli intensity coded by

Answer 15

The frequency of action potentials and the number of receptors activated

Question 16

what are the 4 stages of signal transition

Answer 16

reception, integration, conduction, transission