Basic nervous system

Question 1

nerve

Answer 1

bundle of axons outside of brain and spinal cord

Question 2

ganglion

Answer 2

collection of neuron cell bodies outside brain and spinal cord

Question 3

plexus

Answer 3

extensive network of axons (nerves) and sometimes cell bodies outside CNS

Question 4

Glial cells

Answer 4

supportive cells

Question 5

functions of the nervous system (5)

Answer 5

1. maintain homeostasis
2. Receive sensory input
3. Integrating information
4. Control muscles and Glands
5. Establish and maintain mental activity

Question 6

CNS

Answer 6

receives info from body and sends info to body
“key decision maker”
made up of Brain and spinal cord

Question 7

PNS

Answer 7

detects info around body and sends that info to the brain ; communicates info from brain to body
“messanger”
made up of nerves, ganglia and sensory receptors

Question 8

Sensory Division of PNS

Answer 8

AFFERENT = towards
detects info from sensory receptors and sends them to the CNS
IE–sends message to brain if light in dark room, eye needs to constrict

Question 9

Motor Division of PNS

Answer 9

Efferent=Away

Transmits signals from CNS to effector organ
IE–message to constrict eye in dark room with light

Question 10

Somatic Motor division of PNS

Answer 10

voluntary
ie moving your skeletal muscles
single neuron system

Question 11

Autonomic motor division of PNS

Answer 11

involuntary
ie contraction of heart and smooth muscle and certain glands
two neuron system
one in CNS extends to one in autonomic PNS

Question 12

3 divisions of autonomic motor PNS

Answer 12

parasympathetic
sympathetic
enteric

Question 13

parasympathetic PNS

Answer 13

regulates resting functions IE digesting food or emptying your bladder

Question 14

sympathetic PNS

Answer 14

prepares body for physical activity–fight or flight

Question 15

enteric PNS

Answer 15

plexus within wall of digestive tract