Nervous System ⚡️

Question 1

A system specialized for ..

Answer 1

📌 Reception
📌 Conduction and transmission
📌 Analysis
📌 Coordination
📌 Reaction or response

Question 2

Anatomical ( Topographic ) Parts of NS ..

Answer 2

CNS: Brain and spine cord.

PNS: any nervous tissue other than CNS

Question 3

*Functional Parts of NS ..

Answer 3

Somatic NS: voluntary

Autonomic NS: involuntary

Question 4

Stimulus:

Answer 4

Which provokes excitation.

Question 5

Afferent :

Answer 5

Which carry sensations to CNS.

Question 6

Efferent :

Answer 6

Which carry back orders from CNS to
periphery.

Question 7

• Effector :

Answer 7

Receives the effects.

Question 8

• Response:

Answer 8

Appropriate reaction to a stimulus.

Question 9

Nerve tissue proper are ..

Answer 9

Neurons

Question 10

Special supportive tissue is ..

Answer 10

Neuroglia.

Question 11

The brain is a center
for ..

Answer 11

• registering sensations
• correlating with stored information

-making decisions

• taking action

Question 12

Gray matter contains ..

Answer 12

Nuclei ———> thalamus & basal ganglia

Cortex

Question 13

Major parts of the brain ..

Answer 13

Cerebrum
Cerebellum
Brainstem

Question 14

Brain weigh is ..

Answer 14

3 pounds

Question 15

Neurons ..

Answer 15

Anatomical, reparative, trophic, structural, pathological, functional, physiological, unit of the nervous system.

Question 16

Neurons are highly specialized and differentiated ..

Answer 16

They specialized to propagate the neural impulses by a combination of electrical and chemical processes.

Question 17

Types according to three properties ..

Answer 17

• Number of processes
• Direction of impulse
• Length

Question 18

• Neurons according to direction of impulse conduction ..

Answer 18

Afferent —— sensory
Efferent —— motor
Interneurons —— intermediate neurons

Question 19

• Neurons according to number of processes ..

Answer 19

• Unipolar —— Rare, mesencephalic nucleus of 5th cranial nerve
• Bipolar —— vestibular ganglion, cochlear spiral ganglion, olfactory, retina receptors.
• Multipolar — pyramidal cells in cerebral cortex, purkinji cells in cerebellum
• Pseudounipolar —— dorsal root spinal ganglion

Question 20

• Neurons according to length of their axons ..

Answer 20

• golgi type I —— long pyramidal cells cells in cerebral cortex, Purkinje cells in cerebellum.
• golgi type II —— Short Axons e.g. Cerebral and cerebellar cortex

Question 21

Specific structures: only seen in neurons ..

Answer 21

*Processes-Axon & Dendrites

*Sheaths- Myeline sheath & Neurilemma

Neurofibrils ,Nissl substance

Question 22

General structures of neurons: common to all cells ..

Answer 22

Cytomembrane,Soma or
perikaryon
*Neuroplasm
*Nucleus
*Golgi Apparatus,
*Mitochondria,
*Microtubules,
*Lysosomes,
*Pigment granules i.e. Lipofuscin, Melanin granules