Nervous System (old)

Question 1

CNS

Answer 1

• Brain and Spinal Cord

- Integrative and control centers

Question 2

PNS

Answer 2

• Cranial and spinal nerves

- Communication lines between CNS and rest of body

Question 3

Afferent Division

Answer 3

• Sensory
• Somatic and visceral sensory nerve fibers
• conducts impulses from receptors to CNS

Question 4

Efferent Division

Answer 4

• Motor

Conducts impulses from the CNS to effectors (muscles and glands)

Question 5

Somatic Nervous System

Answer 5

• Somatic motor (voluntary)

- conducts impulses from CNS to skeletal muscles

Question 6

Autonomic Nervous System

Answer 6

• Visceral Motor (involuntary)

- Conducts impulses from CNS to cardiac muscles, smooth muscles, and glands

Question 7

What does a neuron do?

Answer 7

1. Receive Signals (Dendrites & Cell Body)
2. Transmit Signal (Axons)
3. Send signal to other cell (Axon terminal, Synapse)

Question 8

What three shapes do neurons appear as?

Answer 8

1. Unipolar (Dorsal Root Ganglia)
2. Bipolar (Retina)
3. Multipolar (most Common)

Question 9

Cell body and axon of CNS?

Answer 9

• Nucleus

- Tract

Question 10

Cell body and axon of PNS?

Answer 10

• Ganglia

- Nerve

Question 11

What is a Glia?

Answer 11

Cell structures in the nervous system that don’t conduct action potentials. They maintain homeostasis of neurons

Question 12

CNS Glial Cells

Answer 12

• Astrocyte: help form blood-brain barrier and support cell body
• Microglia: modified immune cells
  Ependyma: Creates CSF
• Oligodendrocyte: Myelinates Axons (Unrecoverable)

Question 13

PNS Glial Cells

Answer 13

• Sattelite Cells: support cell bodies

- Schwann Cells: Myelinates axons (recoverable)