CHAPTER 12

Question 1

nervous system functions

Answer 1

collect information, process and evaluate information, initiate response to information

Question 2

somatic motor system

Answer 2

sends voluntary signals to skeletal muscles

Question 3

Which aspect of the efferent nervous system has sympathetic and parasympathetic divisions?

Answer 3

autonomic

Question 4

nerve connective tissue wrappings from deep to superficial

Answer 4

endoneurium, perineurium, epineurium

Question 5

neuron characteristics

Answer 5

excitabililty, conductivity, secretion, extreme longevity, amitotic

Question 6

short, unmyelinated process branching off cell body

Answer 6

dendrite

Question 7

telodendria

Answer 7

axon terminals

Question 8

synaptic knobs house ____ containing neurotransmitters

Answer 8

synaptic vesicles

Question 9

axons split into branches called

Answer 9

axon collaterals

Question 10

Where does the axon attach to the cell body?

Answer 10

axon hillock (triangular region of soma)

Question 11

neurofibril

Answer 11

bundle of neurofilaments

Question 12

anterograde transport

Answer 12

from cell body

Question 13

retrograde transport

Answer 13

to cell body

Question 14

neuron transport occuring at about 400 mm per day

Answer 14

fast axonal transport

Question 15

Slow axonal transport occurs at ____ mm per day

Answer 15

0.1 to 3

Question 16

Substances moved only from cell body toward knob

Answer 16

enzymes, cytoskeletal components, new axoplasm

Question 17

synapse

Answer 17

place where a neuron connects to another neuron or an effector

Question 18

electrical synapse

Answer 18

presynaptic and postsynaptic neurons bound together by gap junctions