Chapter 4- The Nervous System

Question 1

Ependymal cells

Answer 1

Line ventricles of brain and produce CSF

Question 2

Microglia

Answer 2

Phagocytize cells that ingest and breakdown waste products and pathogens in CNS

Question 3

Astrocytes

Answer 3

Nourish neuron and form blood-brain barrier

Question 4

Collection of cell bodies in CNS and PNS

Answer 4

CNS- nucleon

PNS- ganglion

Question 5

Na/K ATPase

Answer 5

Maintains resting membrane potential of -70mV by moving 3Na+ out for every 2K+ ions into the cell

Question 6

Divisions of the spinal cord

Answer 6

1. Cervical
2. Thoracic
3. lumbar
4. sacral

Question 7

Dorsal root ganglia

Answer 7

Cell bodies of sensory neurons

Question 8

PNS

Answer 8

1. somatic- sensory/motor neurons

2. autonomic- involuntary muscles and glands

Question 9

nerves

Answer 9

collections of neurons in the PNS and may contain multiple types of information (sensory and motor). they contain cell bodies in ganglia

Question 10

tracts

Answer 10

collections of neurons in CNS and contain only one type of information. contain cell bodies in nuclei

Question 11

Acetylcholine

Answer 11

neurotransmitter released by the preganglionic neuron in both sympathetic and parasympathetic nervous systems. postganglionic neuron in sympathetic nervous system usually releases norepinephrine, while the postganglionic neuron in the parasympathetic nervous system releases acetylcholine.