7. Reflexes

Question 1

definition:

Answer 1

a rapid, automatic response to a stimulus.

Question 2

what do reflexes require?

Answer 2

1. a stimulus
2. they are involuntary
3. are rapid
4. are stereotypes (occur in the same way each time

Question 3

what are spinal reflexes?

Answer 3

carried out by the spinal cord, with no brain involvement required

Question 4

what does a spinal reflex consist of?

Answer 4

1. a receptor
2. a sensory neuron –> through the dorsal root
3. at least on synapse
4. a motor neuron –> through ventral root
5. a effector (muscle or gland)

Question 5

what are receptors?

Answer 5

the decet changes in the bodies internal or external environment
can be simple nerve endings or sensory organs e.g the eye

Question 6

types of receptors

Answer 6

thermoreceptors
osmoreceptors
chemoreceptors 
touch receptors
pain receptors
protective reflexes present from birth
acquired reflexes