Reflexes

Question 1

reflexes

Answer 1

involuntary movements that require no conscious thought
monosynaptic circuit (one sensory neutron - one motor neuron)
entered around spinal cord (spinal nerves) and brainstem(cranial nerves)

Question 2

monosynaptic pathway

Answer 2

one chemical synapse

e.g one sensory neutron : one motor neurone e.g reflexes

Question 3

reflex pathway components

Answer 3

stimulus 
receptor 
sensory neuron 
synapse 
motor neuron 
effector 
response

Question 4

describe the pharyngeal reflex (gag reflex)

Answer 4

mechanoreceptors detect touch in the posterior part of the tongue, soft palate
stimulates sensory fibres of glossopharyngeal nerve
results in mass contraction of both sides of the pharyngeal and posterior oral musculature

Question 5

salivary reflex

Answer 5

some reflexes involve glands

taste, visual aids and chewing forces all increase salivary flow