What are the responsbilities

of the nervous system

obtain sensory information

and process it

send commands to effector cells

(muscles) to move

What is the

Central Nervous system(CNS)

composed of

Brain

Spinal Cord

What does the

peripheral nervous system(PNS)

composed of

outside of CNS

Nerves-bundles of fibers

of sensory and motor neurons

Ganglia-clusers of cell bodies of neurons)

What are

sensory neurons

conducts signals from sensory

receptors to CNS

what are

interneurons

integrates information

and sends it to motor neurons

automatic response that only

involves the spinal cord

signal carrying cells

aka

functional units of nervous system

List all the components

of a neuron

(8 things)

Cell body

Dendrites

Nucleus

Axon

Myelin Sheath

Schwann Cell

Nodes of Ranvier

Synaptic Terminals

During the neurons resting

potiential what is

high and what is low

inside and out

Inside:

Potassium = high

Sodium = low

Outside:

Potassium = low

Sodium = high

What is a nerve signal's

called

List the steps that it

takes for an action

potential to occur

(6 steps)

1) Resting state Na and K channels closed

2) Stimulus opens some Na channels, AP triggered

3) More Na channels open, interior becomes pos

4) Na channels close, K rushes out, more neg

5) K channels close slowly, neg undershoot

6) Return to resting

How do action potentials

travel, do they change

speeds or strength

All or nothing event that

self propogates along axom

only frequency is affected

not strength or speed given

stimulus strength

A chemical signal secreted by

sending cell

crosses synaptic cleft

binds to receptor on surface of

receiving cell

How would you describe a

vertebrates nervous system

highly centralized (CNS)

Cephalized (concentrated in head)

What is the somatic nervous system

carries signals to and from skeletal

muscles

mainly for external simuli response

What is the autonomic nervous

system

regulates internal environment

controls

   smooth muscle

   cardiac muscle

   organs of various body systems

What does the

parasympathetic division of ANS

primes body for activies that gain

and conserve energy for body

what does sympathetic division of ANS

mean

prepares body for intense,

energy consuming activies

What are some results of

parasympathetic division.

constricts pupil

stimulates saliva production

constricts bronchi

slows heart

stimulates stomach, pancrease, intestine

stimulates urination

stimulates urination

promotes erection

What are some results of

sympathetic division.

Dilates pupil

inhibits saliva production

dilates bronchi

accelerates heart

stimulates epinephrine

and norepinephrine release

stimulates glucose release

inhibits stomach pancreas and intestines

inhibits urination

promotes ejaculation and vaginal contractions

Forebrain:

  cerebral cortex

  cerebrum

  thalamus

  hypothalamus

pituitary gland

midbrain

hindbrain:

  Pons

  Pedulla Oblongata

  Cerebellum

Spinal Cord

page 24 of lec 9 ref

Midbrain, hindbrain,thalamus

hypothalamus

do what

conduct info from higher brain centers

regulate homeostatic functions

keep track of body positon

sort sensory information

part of forebrain

largest and most complex part of brain

most integrative power in cerebral cortex

describe the

cerebral cortex

5mm thick

80% of brain mass

specialized integrated regions

centers for:

vision,hearing,taste,and smell

Frontal lobe

Parietal lobe

Occipital lobe

Temporal lobe

What does the frontal

lobe control

Speech

motor cortex

What does the

Parietal lobe control

Speech

taste

reading

What does the

Occipital lobe control

What does the

temporal lobe

control

Hearing

Smell

Severe mental disturbance

loss of ablity to distinguish reality

Describe depression

and treatments

Major depression

bipolar disorder - manic-depressive disorder

selective serotonin reuptake inhibitors

confusion

memory loss

motor disorder

difficulty in initiating movements

slowness of movement

rigidity