Ch 12

Question 1

Central Nervous System(CNS)

Answer 1

Brain
Midbrain
Brain Stem- Pons, Medulla Oblongata
Spinal Cord

Question 2

Ectoderm

Answer 2

Germ layer for nervous system development

Question 3

Organization of Nervous System

Answer 3

Central Nervous System-()-Peripheral Nervous System
Brain/ Spinal Cord I Sensory Division & Motor Division
I I
Visceral(VSD) & Somatic(VSD) |Visceral(VMD) & Somatic(SMD)
|

                 Enteric Nervous System/Sympathetic division/Parasympathetic division

Question 4

Visceral Sensory Division

Answer 4

Neurons that process input/signals going to CNS from INTERNAL ORGANS

Question 5

Somatic Sensory Division

Answer 5

Sensory input from the rest of the body(skin, muscles, etc)

Question 6

(VMD)Sympathetic Division

Answer 6

Fight or Flight reponses

Question 7

(VMD)Parasympathetic Division

Answer 7

Rest and Digest, brings body back to rest and is involved in digestion

Question 8

Somatic Motor Division (SMD)

Answer 8

Responsible for Voluntary actions/output: examples; writing, speaking, moving head

Question 9

Enteric Nervous System

Answer 9

100,000,000 million neurons apart of the digestive system

Considered to be a separate nervous system

Question 10

Dendrites

Answer 10

Where electrical signals are transmitted to neuron (considered to be Input region)

Question 11

Neurosoma

Answer 11

Body of Neuron where Organelles of neuron are found ex- Nucleus(contains dna and nucleolus), neurofibrils, chromatophillic substance( rough er/ribosomes)

Question 12

Axon Hillock

Question 13

Axon Terminal

Answer 13

Transmit electrochemical signal to a cell or tissue /Output region of neuron

Question 14

Axon Collateral

Answer 14

Branch that comes off of Axon

Question 15

Axon

Answer 15

Responsible for neuron’s Conduction of electrical signals

Question 16

Neurlemma

Answer 16

Layers produced by Schwann cells found only in the PNS that enables PNS neurons to be able to repair themselves when damaged

Question 17

Role of Interneurons

Answer 17

Connect incoming/sensory signals to motor/outgoing signals

Question 18

Multipolar Neurons

Answer 18

-Many Dendrites
- One Axon
- CNS neurons/ Alphamotor neurons

Question 19

Bi Polar Neurons

Answer 19

-One Dendrite
-One Axon
Separated by Neurosoma

Question 20

Unipolar Neurons

Answer 20

-Dendrite and Axon are in line (no separation/one long axon) Neurosoma is off to the the side.
-Found in PNS
- Sensory Neurons/receptors example being nociception- pain receptors in skin

Question 21

Myelination

Question 22

Neuroglia

Answer 22

Cells that hold nervous system together keeping them healthy and protecting them

Question 23

Oligodendrocyte(Neuroglial cell)

Answer 23

Responsible for Myelination of CNS axons

-wraps itself/myelinates around multiple axons

Question 24

Ependymal Cells

Answer 24

Secrete and circulate(cilia) CSF

Question 25

Microglial cells

Answer 25

Phagocytes/Filter of CNS- Engulfs/absorbs bad bacteria of CNS

Question 26

Astrocytes

Answer 26

Responsible for blood-brain-barrier

Question 27

Astrocyte Function

Answer 27

-Regulate blood flow
- Convert glucose to lactate
-promote synapse formation

Question 28

Ganglia

Answer 28

Grouping together of many neuron’s Neurosoma and axons that form an enlargement.

Question 29

(Nerve) vs [Tract]

Answer 29

(Collection of axons PNS) vs [collection of axons CNS]

Question 30

Grey Matter

Answer 30

Part of a neuron that isn’t myelinated

Question 31

White Matter

Answer 31

Oligodendrocyte (Myelinated) axons of neurons

Question 32

Neuron vs Nerve

Answer 32

Individual nerve cell vs collection of axons of many nerve cells