Nervous

Question 1

influence the ectodermal cells to thicken forming a bending neural plate

Answer 1

Notochord

Question 2

initial formation of nervous system

Answer 2

neurulation

Question 3

functional units of both cns and pns

Answer 3

neurons

Question 4

3 main parts of neurons

Answer 4

Cell body
dendrites
axon

Question 5

Neurons can be classified according to the number of processes extending from the cell body. What are those classifications?

Answer 5

Multipolar
Bipolar
Unipolar
Anaxonic

Question 6

often large, with a large, euchromatic nucleus and well-
developed nucleolus

Answer 6

Cell body (perikaryon or soma)

Question 7

serve as the initial processing sites for
synaptic signals

Answer 7

dendritic spines

Question 8

typically short, small processes emerging and branching off the soma

Answer 8

dendrites

Question 9

typically, longer than its dendrites; carries impulses from the cell body; covered by a myelin sheath composed
of other cells

Answer 9

Axons

Question 10

are sites where nerve impulses are
transmitted from one neuron to another, or from neurons and other effector cells.

Answer 10

Synapses

Question 11

Types of synapses

Answer 11

Axosomatic
Axodendritic
Axoaxonic

Question 12

substitute for cells of connective tissue in some respects, supporting neurons and creating immediately around those cells
microenvironments that are optimal for neuronal activity.

Answer 12

Glial cells

Question 13

Types of glial cells

Answer 13

Oligodendrocytes
Astrocytes
Ependymal Cells
Microglia
Schwann Cells
Satellite Cells

Question 14

This neural plasticity and reformation of processes are controlled by several growth factors produced by both neurons and glial cells in a family of proteins called

Answer 14

Neurotrophins

Question 15

The onset of regeneration is signaled by changes in the perikaryon that characterize the process of

Answer 15

Chromatolysis

Question 16

Nerve organization

Answer 16

1. Endoneurium 2. Perineurium 3. Epineurium

Question 17

ovoid structures containing neuronal cell bodies and their surrounding glial satellite cells

Answer 17

Ganglia

Question 18

associated with both cranial nerves and the dorsal roots of the spinal nerves

Answer 18

Sensory Ganglia

Question 19

affect the activity of smooth muscle, the secretion of some glands, heart rate, and many other involuntary activities by which the body maintains a constant internal environment

Answer 19

Autonomic Ganglia

Question 20

sheathed the axon that may or may not form myelin

Answer 20

Shwann cells

Question 21

united multiple layers of schwann cells; composed
mainly of lipid bilayers and membrane proteins

Answer 21

Myelin sheath

Question 22

found between schwann cells in
the axon that renew the action potential and produce saltatory movement

Answer 22

Nodes or ranvier or nodal gaps

Question 23

Two neurons circuit:

Answer 23

Preganglionic fiber & Postganglionic fiber