Lecture 1

Question 1

Organization of Nervous System

Answer 1

CNS - Brain (cerebrum, brainstem, cerebellum) and Spinal Cord
PNS - Somatic (motor and sensory) and Autonomic [motor (SNS & PSNS) and sensory]

Question 2

Afferent vs Efferent

Answer 2

Afferent: carries sensory info. from receptors to CNS
Efferent: carries motor commands from CNS to periphery

Question 3

Neuron function

Answer 3

Transmit information using electrical and chemical signaling (action potentials and neurotransmitters)

Question 4

Oligodendrocytes vs Schwann cells

Answer 4

Both make myelin, oligodendrocytes in CNS, Schwann in PNS

Question 5

Six types of neuroglial cells

Answer 5

PNS - Schwann & Satellite (surround sensory neuron soma)
CNS - Oligodendrocytes, Astrocytes (form glial scar), Microglia, Ependymal cells (line ventricles of brain and SC, produce CSF)

Question 6

Epineurium

Answer 6

Connective tissue surrounding entire peripheral (spinal & cranial) nerves

Question 7

Perineurium

Answer 7

Connective tissue surrounding bundles of axons

Question 8

Endoneurium

Answer 8

Connective tissue surrounding individual axons

Question 9

Large diameter axons are for ___
Small diameter axons are for ___

Answer 9

Touch/pressure/vibration
Pain/temperature

Question 10

Dorsal root ganglia

Answer 10

Somatic
Cell bodies of primary sensory neurons (pseudounipolar)
Nuclei in center of cell
Soma surrounded by satellite cells

Question 11

Autonomic ganglia

Answer 11

(Para)sympathetic ganglia
Cell bodies of postsynaptic motor neurons (multipolar)
Nucleus not in center of cell
Satellite cell sheath less apparent

Question 12

Nuclei vs Ganglia

Answer 12

Nuclei: Group of cell bodies in CNS
Ganglia: Group of cell bodies in PNS

Question 13

Tract vs Nerve

Answer 13

Tract: bundle of axons in CNS
Nerve: bundle of axons in PNS