Nervous System-Lecture 10

Front 1

What is the neural tube derived from and where does it develop?

Back 1

Derived from ectoderm and depelops posterior to the notochord

Front 2

What does the neural tube become?

Back 2

Central nervous system

Front 3

What is the neural crest?

Back 3

Crest of cells that develops superficial to the neural tube

Front 4

What does the Neural crest become?

Back 4

Peripheral Nervous System

Front 5

The CNS becomes?

Back 5

The brain and Spinal Chord

Front 6

THe PNS becomes?

Back 6

the spinal nervee
1.cranial nerves
2. ganglia

Front 7

What does the ganglia do?

Back 7

carries info between the CNS and the skin and muscle

Front 8

CNS includes all tissue in?

Back 8

The brain and spinal cord

Front 9

PNS includes all tissue in?

Back 9

peripheral to the CNS, peripheral nerves

Front 10

The CNS ___________ sensory information from the ______: this is incoming or ____________ information; which means senasation (pain temp, etc)

Back 10

-interprets
-PNS
-afferent
*sensory neurons do this

Front 11

CNS sends _______ responses to the ____: these are outgoing or efferent commands (signals that produce movement)

Back 11

motor
PNS

Front 12

What does the CNS control?

Back 12

It controls the action of muscles in the organs and systems in response to sensations

*motor neurons do this

Front 13

A function of the CNS also includes __________ and ________________ "higher functions" What does this include and what makes it do this?

Back 13

processing and coordinating

-consciousness
-intelligence
-memory
-learning
-emotion

*interneurons do this (integrate info)

Front 14

The PNS delivers __________ information from receptorsin the periphery (skin and muscles to the CNS)

Back 14

-sensory
*its sensory neurons do this

Front 15

The PNS delivers __________ commands from the ________ to the muscles in the periphery

Back 15

-motor
-CNS

*motor neurons do this

Front 16

These are neurons that usually detect"receive" sensations

Back 16

Receptors

Front 17

There are __ divisions of the ________ portion of the PNS

Back 17

2

motor

Front 18

The first division of the PNS is :

Back 18

Somatomotor Nervous System (somata=body wall)

Front 19

The somatomotor vervous system controls what?

Back 19

The Skeletal Muscle Contractions

Front 20

Skeletal Muscles are associated with:

Back 20

-The skeleton
-Voluntary muscle contractions
-Some reflexes (involuntary contractions)

Front 21

The 2nd division of the Motor portion of the PNS is?

Back 21

-autonomic nervous system (visceromotor Nervous system)

Front 22

The autonomic nervous system influences which muscle contraction?

Back 22

-cardiac and muscle

Front 23

Smooth and Cardiac muscles are associated with what?

Back 23

-visceral organs (heart, blood vessels, gut)
-involuntary contractions
-glandular secretion

Front 24

There are two parts to the Autonomic system, what are they?

Back 24

Sympatheitic and parasympathetic division

Front 25

The sympathetic division of the ANS __________ the body

Back 25

stimulates

- "flight or fight" (heart rate goes up)

Front 26

The parasympathetic system of the ANS __________ the body

Back 26

relaxes

*"rest and digest" heart rate goes down

Front 27

Nervous Tissue is composed of ____ Cell Neurons

Back 27

2

Front 28

What are the two cell neurons that compose the vervous tissue?

Back 28

Communicate: send signals to other neurons in the body or muscles

Glia: support the neurons, regulate ionic environment around neurons, and are ESSENTIAL for survival and funtioning of neurons

Front 29

What are Three main components of a typical neuron?

Back 29

-Cell body(receives and sends incoming signals form other neurons)
-Dendrites: receive incoming signals from other neurons
-Axon: carries outgoing signals to other neurons or muscles
-Synaptic Nerve Terminals: ends of axonx, signal is transferred to other cell

Front 30

LOOK AT Which slide an memorize?

Back 30

GLIAL CELL in Lecture 10!

Front 31

Myelin is composed of what?

Back 31

Lipids

Front 32

Myelin ___________ axons ans ___________ the speed of action

Back 32

insulates


increases

Front 33

What do Scwann cells do?

Back 33

myelinate axons in the PNS

Front 34

__ Scwann cell myelinates only __ segment of ___ axon.

Back 34

1
1
1

Front 35

Where do oligodendroglial cells myelinate axons?

Back 35

in the CNS

Front 36

Each oligo myelinates __ axon segment but of _______ (word) axons

Back 36

1


many

Front 37

What is an Action Potential?

Back 37

An electrical signal that travels along axon and is transmitted from the presynaptic neuron's nerve terminals to the post synaptic cell at the synapse

Front 38

A synapse is the site of ________ between the ________ terminals and antoher cell

Back 38

-contact
-nerve

Front 39

What are the two types of Synapses?

Back 39

Neuron/Neuron junction-synapse between two neurons

Neuro muscular junction: synapse btwn neuron and muscle fiber