Anatomy Test #3 The Peripheral Nervous System

Front 1

Peripheral nervous system is composed of what?

Back 1

Nerves extending from the brain and spinal cord

Front 2

Spinal nerves function

Back 2

Carry impulses to and from the spinal cord

Front 3

Cranial nerves function

Back 3

Carry impulses to and from the brain

Front 4

Function of peripheral nervous system

Back 4

Serve as communication lines among sensory organs, the brain and spinal cord, and glands or muscles.

Front 5

Satellite cells

Back 5

Protect neuron cell bodies

Front 6

Schwann cells

Back 6

Form myelin sheaths in the peripheral nervous system

Front 7

Myelin characteristics

Back 7

1. Lipid molecule
2. White colored
3. acts as an electrical insulator
4. Maintains strong signal
5. Keeps signals from crossing

Front 8

Ganglia

Back 8

Collections of cell bodies outside the Central nervous system, in the PNS

Front 9

Nerves

Back 9

Bundles of nerve fibers in the PNS

Front 10

Axons

Back 10

nerve fibers

Front 11

Sensory (afferent) Neurons

Back 11

Carry impulses from the sensory receptors to the CNS

Front 12

Propioceptors

Back 12

Detect stretch or tension in muscles or tendons

Front 13

Multipolar neurons

Back 13

many extensions from the cell body, most common type of structure

Front 14

Bipolar neurons

Back 14

one axon and one dendrite, located in special sense organs, these are rare in adults

Front 15

Unipolar neurons

Back 15

Sensory neurons found in the PNS, Have two short single process leaving the cell body

Front 16

Irritability

Back 16

Ability to respond to stimuli

Front 17

Conductivity

Back 17

Ability to transmit an impulse

Front 18

Reflex

Back 18

Rapid, predictable, and involuntary response to a stimulus

Front 19

Reflex arc

Back 19

Direct route from a sensory neuron, to an interneuron, to a an effector

Front 20

Somatic reflexes

Back 20

Reflexes that stimulate the skeletal muscles

Front 21

Autonomic reflexes

Back 21

Regulate the activity of smooth muscles, the heart, and glands

Front 22

Five elements of a reflex

Back 22

Sensory receptor, sensory neuron, integration center (CNS), motor neuron, effector organ

Front 23

The reflex arc: role of Sensory receptor

Back 23

reacts to a stimulus

Front 24

The reflex arc: role of Sensory neuron

Back 24

carries message to the integration center

Front 25

The reflex arc: role of Integration center

Back 25

processes information and directs motor output

Front 26

The reflex arc: role of Effector organ

Back 26

is the muscle or gland to be stimulated

Front 27

The reflex arc: role of Motor neuron

Back 27

carries message to an effector

Front 28

Two neuron reflex arc

Back 28

Simplest type of reflex

Front 29

Three neuron reflex arc

Back 29

Consists of five elements: receptor, sensory neuron, interneuron, motor neuron, and effector