nervous system

Question 1

what is in the central nervous system

Answer 1

brain and spinal cord

Question 2

what is in the peripheral nervous system

Answer 2

cranial nerves, spinal nerves, ganglia

Question 3

what are ganglia

Answer 3

clusters of neuron cell bodies located outside the central nervous system

Question 4

what are the specialized nerve endings that collect information by detecting changes in the internal/external environment

Answer 4

receptors

Question 5

afferent is

Answer 5

inflowing

Question 6

what is the somatic sensory

Answer 6

the general somatic senses like touch, pain, pressure, vibration, temperature,

Question 7

the somatic senses are considered ________

Answer 7

voluntary, because we have control over them

Question 8

________ ________ is said to be involuntary

Answer 8

visceral sensory

Question 9

efferent

Answer 9

conducting outward

Question 10

which division is towards the CNS

Answer 10

sensory (afferent) division

Question 11

which division is away from the CNS

Answer 11

motor (efferent) division

Question 12

what are the two categories under the motor (efferent) division

Answer 12

somatic motor and autonomic motor

Question 13

what is the motor/efferent division responsible for

Answer 13

transmitting motor impulses from the CNS to the mucles or glands

Question 14

what is the sensory/afferent division responsible for

Answer 14

recieving sensory info from receptors and transmitting this info to the CNS

Question 15

the somatic motor system is considered _____ whereas the autonomic motor system is considered ______

Answer 15

voluntary, involuntary

Question 16

what does the somatic motor system do

Answer 16

conducts nerve impulses from the CNS to the skeletal muscles causing them to contract

Question 17

what does the autonomic motor system do

Answer 17

innervates internal organs and regulates smooth muscle, cardiac muscle, and glands

Question 18

what is the condition called where the autonomic motor component doesnt function properly

Answer 18

dysautonomia

Question 19

what are the two divisions of the autonomic motor component

Answer 19

sympathetic and parasympathetic division

Question 20

what does the sympathetic division of the autonomic motor component do

Answer 20

typically speeds up body activities

Question 21

what does the parasympathetic division of the autonomic motor component do

Answer 21

typically slows down body activities

Question 22

what are neurons

Answer 22

excitable cells that initiate and transmit nerve impulses

Question 23

what are glial cells

Answer 23

nonexcitable cells that support and protect the neurons

Question 24

what part of the neuron conducts nerve impulses TOWARDS the cell body

Answer 24

dendrites

Question 25

what part of the neuron conducts nerve impulses AWAY from the cell body

Answer 25

axons

Question 26

glial cells can do this, neurons usually cant

Answer 26

mitosis

Question 27

what is another name for glial cells

Answer 27

neuroglia

Question 28

what are the 3 types of glial cells we need to know about for this class

Answer 28

astrocytes, ependymal cells, oligodendrocytes

Question 29

what do the glial cells astrocytes do

Answer 29

reduce permeability (blood brain barrier) they wrap around the outer surface of capillaries in the brain to help make them more selectively permeable

Question 30

what are the most abundant type of glial cell

Answer 30

astrocytes

Question 31

what do the glial cells ependymal cells do

Answer 31

make up the choroid plexus (along w nearby capillaries) which produces CSF

Question 32

what do oligodendrocytes (CNS) and neurolemmocytes/schwann cells (PNS) do

Answer 32

produce insulating material myelin which surrounds many neurons forming a myelin sheath

Question 33

what is a nerve

Answer 33

a bundle of parallel axons

Question 34

what nervous system are nerves part of

Answer 34

the peripheral nervous system

Question 35

what do sensory nerves do

Answer 35

convey sensory info to the CNS and all the axons are conducting impulses in the same direction

Question 36

what do motor nerves do

Answer 36

convey motor impulses from the CNS to the muscles and glands and all the axons are conducting impulses in the same direction

Question 37

what week of fetal development does nervous tissue start to develop

Answer 37

during the 3rd week