Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

physiology of the nervous system

No description
by

asmaa ali

on 7 October 2015

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of physiology of the nervous system

Physiology of The Nervous System
What is the nervous system ?
it is a complex network of specialized cells

responsible for:
communication and
controlling the body function.

communication:
within the body
between the body and external environment
.
The nervous system is divided into:
A) central nervous system
1) brain
2) spinal cord

b) peripheral nervous system
conduct the impulses to and from the organs and the CNS.
12 pairs of nerves come from the brain
CRANIAL NERVES
SPINAL NERVES
31 pairs of nerves come from the spinal cord.
Classified according the origin into:
It is not that simple
Peripheral Nervous System
Afferent PNS
sensory devision
Efferent PNS
motor devision
conduct sensory information from sense organs and other internal organs to CNS
conduct nerve impulses from CNS to organs and muscle
Efferent (MOTOR) PNS
Somatic
Autonomic
from CNS to voluntary muscles (skeletal muscles)
from CNS to organs and glands
smooth muscles (involuntary functions)
Autonomic nervous system
(involuntary functions)
sympathetic
parasympathetic
fear, fight & flight
stress - emergency
rest & digest
relax - non-emergency
divisions of the nervous system
The Relationship Between CNS & PNS
Functions of the NS:
sensory function
(information gathering)
transmittion of information

integrative function
motor function
afferent
efferent
CNS
Types of the cells in the nervous system
claasification of the neurons according to their function:
sensory (receptor) neurons
interneurons (connectors)
motor neurons
formation of myelin sheath inside CNS
Schwann cells
formation of myelin sheath inside PNS
wrap around the capillaries to form the Blood Brain Barrier (BBB)
phagocytic cells, protect against infections
Ependymal cells
Cylindrical cells, cover the cavities of CNS, responsible for producion of CSF
Signal Transmission
Signal transmission = impulse propagation through the nervous system
Electrical transmission
Chemical transmission
Resting Membrane Potential:
Polarized membrane:
membrane action potential = -70 mv
the membrane can receive signals only in this case.
what is the source of this action potential?
what keep this action potential at this level?
Action potential:
threshold stimulus
Signal Termination
mechanism of action of neurotransmittor ??
The neurotransmitter is removed by one of two ways:

reuptake by the presynaptic neurons
breakdown by special enzymes
Full transcript