chapter 16- nervous tissue

Question 1

central nervous system structure and function

Answer 1

brain and spinal cord, integration and command center

Question 2

peripheral nervous system structure and function

Answer 2

paired spinal and cranial nerves, carry messages to and from CNS

Question 3

3 functions of nervous system

Answer 3

sensory input, integration, motor output

Question 4

what happens in motor output

Answer 4

effector organs (muscles and glands) are activated to produce a response

Question 5

sensory afferent division

Answer 5

peripheral division that carries info TO the brain

Question 6

sensory afferent fibers

Answer 6

carry impulse from skin, skeletal muscles, and joints to the brain

Question 7

visceral afferent fibers

Answer 7

carry impulse from visceral organs to brain

Question 8

motor efferent division

Answer 8

carry info FROM brain to effector organs

Question 9

somatic nervous sustem

Answer 9

voluntary control of skeletal muscles

Question 10

autonomic nervous system

Answer 10

involuntary control of smooth and cardiac muscles, glands. sympathetic or parasympathetic

Question 11

nervous tissue is vascular or avascular

Answer 11

vascular

Question 12

structural unit of nervous system

Answer 12

neurons

Question 13

neuron characteristics

Answer 13

large, can’t replace, extreme longevity, high metabolic rate, need carbs, all have cell body and at least one process

Question 14

neuron processes

Answer 14

dendrites and axons

Question 15

dendrite

Answer 15

branches that receive messages and send them to neurons

Question 16

axons

Answer 16

generate and transmit action potentials and secrete neurotransmitters form axon to chemical signals

Question 17

neuroglia

Answer 17

small cells that support, nourish, and protect neurons, replace when damaged

Question 18

neuroglia of CNS

Answer 18

astrocytes, microglial, ependymal, oligodendrocytes

Question 19

myelin sheath

Answer 19

composed of myelin- white protein lipid substance that protects and electrically insulates axons, increases speed of neuron transmitters

Question 20

myelinated fibers

Answer 20

sheath surrounding most large axons, faster

Question 21

nonmyelinated fibers

Answer 21

no sheath, slower