Reflex Arc

Question 1

Receptor Description

Answer 1

Site of stimulus action, receptor end of dendrite or special cell in receptor organ

Question 2

Receptor Function

Answer 2

Responds to some change in internal or external environment.

Question 3

Sensory Neuron Description

Answer 3

Afferent Neuron, cell body is in ganglion outside CNS; axon extends into CNS

Question 4

Sensory Neuron Function

Answer 4

Transmits nerve impulses from receptor to CNS.

Question 5

Integration Center Description

Answer 5

Always within CNS; in simplest reflexes it consists of synapse between motor and sensory neurons, more commonly one or more interneurons are involved

Question 6

Integration Center Function

Answer 6

Process Center; region in CNS where incoming sensory impulses generate appropriate outgoing motor impulses.

Question 7

Motor Neuron Description

Answer 7

Efferent Neuron; dendrites and cell body are in CNS; axon extends to periphery

Question 8

Motor Neuron Function

Answer 8

Transmits nerve impulses from integration center in CNS to effector organ

Question 9

Effector Description

Answer 9

Muscle or gland outside CNS

Question 10

Effector Function

Answer 10

Responds to impulses from motor neuron to produce an action such as contraction or secretion.