Introduction

Question 1

what are the two main parts of Nervous System ?

Answer 1

Central Nervous System (CNS) and Peripheral Nervous System (PNS)

Question 2

What are the main components of CNS ?

Answer 2

Spinal cord and the brain.

Question 3

What are the main components of PNS ?

Answer 3

Spinal Nerves and Cranial Nerves.

Question 4

What are the main components of the brain ?

Answer 4

the cerebrum, the cerebellum, and the brainstem

Question 5

What are the components of the cerebrum ?

Answer 5

Two massive cerebral hemispheres (separated from each other by the longitudinal fissure) and the diencephalon

Question 6

What are the two main categories of cells in the brain ?

Answer 6

nerve cells, or neurons, which are the information-processing and signaling elements, and glial cells, which play a variety of supporting roles.

Question 7

List and descirbe the main components of neurons

Answer 7

cell body (soma) –> supports the metabolic and synthetic needs of the rest of the neuron.

dendrites –> receive information from other neurons via synaptic contacts (or synapses)

axon –> conducts information away from the cell body.

Question 8

Descibe the two main divisions Nervous System Matter and what is their main components

Answer 8

Grey Matter and White Matter.

Grey Matter refers to areas where there is a preponderance of cell bodies and dendrites.

Specific areas of gray matter are often called nuclei, particularly if the contained cell bodies are functionally related to one another. An area where gray matter forms a layered surface that covers some part of the CNS is referred to as a cortex

White matter refers to areas where there is a preponderance of axons , and it refers too to the cell bodies of axions in PNS.

Question 9

What are the main types of Glia in CNS ?

Answer 9

— astrocytes: maintain iconic balance, transfer metablities , respond to neural injury by forming scar tissue
— ependymal cells : create the lining of ventricles and choroid plexus.
— microglia : the immune cells of the brain.

Question 10

Going toward the head called ________

Answer 10

superior ( = Dorsal)

Question 11

Going toward the foot called _______ ?

Answer 11

inferior ( = Ventral)

Question 12

Going toward the back called ______ ?

Answer 12

Posterior

Question 13

Going toward the front called ______ ?

Answer 13

Anterior

Question 14

Going toward the middle called _______ ?

Answer 14

Medial

Question 15

Going toward the limbs (hands) called ______ ?

Answer 15

Lateral

Question 16

the plane that cross the body from the middle (magician style) called ______

Answer 16

Axial / horizontal / transverse plane

Question 17

the plane that cross the body vertically and separates front from back called ______

Answer 17

coronal / frontal plane

Question 18

the plane that cross the body vertically and separates ears called _______ ?

Answer 18

Sagittal