Lesson 7

Question 1

What can glial cells do

Answer 1

_bind nurons together
-provide insolation
-helps with neuron repair
-eleminate watste

Question 2

what are the five types of glial cells

Answer 2

Ependymal cell
Astrocyte
Microglial cell
oligodroglial cell
Schwann call

Question 3

Ependymal cell

Answer 3

-small ovoid, found in the walls of he ventricles
-they make and secrete cerebrospinal fluid

Question 4

Hydrocephalus

Answer 4

buildup of pressure in the brain caused by the blockage of flow of cerebrospinal fluid

Question 5

Astrocytes

Answer 5

-star shaped and symetrical
-its extensions attach to blood vessels or brain lining to hold neurons in place
-transport or substances between neurons and capillaries
-enhances brain activity

Question 6

Microglia

Answer 6

-protects the nervous system and removes its waste
-monitor and maintain the health of the brain tissue
-identify and attack foreign tissue
-when brain cells are damaged they invade the area to provide growth factors

Question 7

Myelin

Answer 7

Glial coating that surrounds axon
-myelinated neurones transmit faster
-longer neurone require more myelination

Question 8

Oligodendroglia cells

Answer 8

-glial cells in the central nervous system that myelinate axons in the brain and spinal cord only
-Send out large flat branches that enclose and separate adjacent axons

Question 9

Schwann cells

Answer 9

-glial cells in the peripheral nervous system that myelinate axons
-each Schwann cell wraps itself repeatedly around a part of an axon

Question 10

Multiple scleroses

Answer 10

-associated with loss of myelin
-damage to oligodendroglia and Schwann cells
-low flow among affected areas causing impaired movements and cognitive function

Question 11

Paralysis

Answer 11

-loss of sensation and movement due to nervous system injury

Question 12

internal structure of a cell

Answer 12

to a large extent a cells proteins determine its characteristic and functions
-each cell can manufacture thousands of proteins
-water salts and ions plat prominent roles in the cells functions

Question 13

atom

Answer 13

smallest quantity of an element that retains the properties of that element
-atoms are electrically neutral
-protons carry positive charge
-electrons carry negative charge

Question 14

Ion

Answer 14

an ion is a changed atom, can be either positive or negative charge

Question 15

Molecules

Answer 15

-formed when atoms bind together
-smallest unit of a substance that contain all of that substances properties

Question 16

Cell membrane

Answer 16

-impermeable
-separates intracellular and extracellular fluid
-regulates movement of substances into and out of the cell
-made up of phospholipids

Question 17

nucleus

Answer 17

-the cells executive office
-blueprints for making proteins(genes) are stored copied and sent

Question 18

gene

Answer 18

-segment of DNA that encodes the synthesis of particular proteins