chapter 11

Question 1

nerous system consist of

Answer 1

brain spinal cord and the nerves

Question 2

what are the two organ systems

Answer 2

endocrine controls horomes nervous system uses electrical signals to transmit messages

Question 3

central nervous system

Answer 3

conisists of the brain and signal cord

Question 4

peripheral nerous system

Answer 4

consist of the vast network of nerves throughout the body

Question 5

neuroglia also called glial cells

Answer 5

neuroglia are the supportive cells of the nervous system (GLia means glue and neurogila means support)

Question 6

oligodendrocytes does

Answer 6

form myelin sheaths in the brain and spinal cord: speed signal conduction

Question 7

ependymal ceels

Answer 7

lines spinal cord and cavities of the brain: some secrete cerebrospinal fluid, where as others have a cilia and aid fluid circulation

Question 8

microglia

Answer 8

perform phagocytosis: engulfs microorganisms and cellular debris

Question 9

astrocytes

Answer 9

extend through brain tissue, nourish neurons help form blood brain barriers

Question 10

schwann cells

Answer 10

froms myelin sheath around nerves in pns, form neruilemma

Question 11

sensory neurons

Answer 11

touch pressure heat cold or chemicals and then stimuli to the cns

Question 12

interneurons

Answer 12

connect spinal motor and sensory neurons

Question 13

motor neurons

Answer 13

relay messages from the Brain to the muscles and glands

Question 14

multipolar neurons

Answer 14

most common have one axon multiple dendrites

Question 15

bipolar neurons

Answer 15

have to processes and axon and a dendrite with a cell body in between the two processes

Question 16

unipolar neurons

Answer 16

simplest form only have axon

Question 17

soma

Answer 17

cell body

Question 18

dendrites

Answer 18

recicve signals from other neurons

Question 19

axons

Answer 19

carries nerve signals away from the cell body

Question 20

myelin sheath

Answer 20

insulating layer or sheath that froms around nerves

Question 21

Ranvier

Answer 21

gaps in the myelin sheath

Question 22

synaptic knob

Answer 22

end of axon branch