Nervous System Made Of

Question 0

Where is gray matter

Answer 0

Cell bodies in the cortex and sub cortex

Cell bodies are either neurons or glial cells

Question 1

Brain tissue made of?

Answer 1

Gray matter(cell bodies of neurons)
White matter (axons, dendrites)

Question 2

What is white matter

Answer 2

Covered in myelin which is white in color

Question 3

What is a neuron

Answer 3

Excitable nerve cells

Capable of communicating with other nerve cells (neurons)

Question 4

What do neurons do

Answer 4

Receive, conduct, or transmit neural impulses to a muscle, gland or other neuron

Question 5

Neurons metabolize

Answer 5

Metabolic rate of cells on the nervous system is higher than any other cells in human body
Energy must be constant for metabolism

Question 6

What do cells metabolize

Answer 6

Neurotransmiters

Question 7

How do neurons communicate neural impulses

Answer 7

Bilipid cell membrane allows only certain things in using specialty channels

Question 8

Cell bodies

Answer 8

Contains organelles made of molecules including the nucleus

Question 9

Nucleus

Answer 9

Made of proteins

Keep DNA

Question 10

Nucleolus

Answer 10

Contain cell RNA support/messenger for DNA protein synthesis

Question 11

Cytoplasm

Answer 11

Protein synthesis/deliverer: energy

Question 12

Cytoskeleton.

Answer 12

Maintain structure of entire cell

Comprised of protein

Question 13

Cell membrane

Answer 13

Bilipid membrane insulates the nucleus from extracellular chemicals but allow Neurotransmiters in

Question 14

Dendrite

Answer 14

Receive incoming transmission from other neurons
1 dendrite per body- unipolar
More than 1- multipolar
Forms dendritic tree, greater area to receive input

Question 15

Axon

Answer 15

Conducts impulses away from neuron, to other neurons
Only one per cell body
Divides into terminal branches (terminal boutons)

Question 16

Myelin sheath

Answer 16

Glial cells which grow to form sheath of electrical insulation around axon
Support/increase speed of neural transmission along axon

Question 17

Synaptic cleft

Answer 17

The site where terminal boutons from the axon form one cell meets the densities of another cell

Question 18

How do neurons communicate

Answer 18

By transmission of chemicals which occurs at the synaptic cleft
Neurotransmiters are released by action potential or electrical potential crossing the cell membrane

Question 19

What are neuroglial cells

Answer 19

Are cells which provide various support services to the nervous system
Have same intracellular stricture as neurons
Glial cells pit numbers neurons 10:1

Question 20

What do glial cells not do

Answer 20

They do out conduct neural impulses (like Neurons do )

Question 21

Astrocyte (defense)

Answer 21

Provide structural matrix to neurons in cns
Form right walls creating a blood Brain barrier so that substances cannot just pass from bloodstream directly into neural tissue
Plasticity/neural growth

Question 22

Oligodendrocytes (transport speed)

Answer 22

Form and support myelin (processing speed) to cover axons

Exist in the pns where called Schwann to support myelin for nerves

Question 23

Microglia (zombies, doctors)

Answer 23

Scavenger cells which clean up dead neurons
Migrate to site of lesion m, turn into macrophages, eat
Orchestrate immune system responses to infection
Bleed, infant, necrotic tissue

Question 24

Ependyma (packing gel)

Answer 24

Line the ventricles of the Brian and spinal cord
Form the choroid plexus which make csf
Help clear away toxins from brain tissues itself
Crucial for boyancy