Cell physiology neuron
Download
1 / 21

CELL PHYSIOLOGY (Neuron) - PowerPoint PPT Presentation


  • 122 Views
  • Uploaded on

CELL PHYSIOLOGY (Neuron). ANATOMY OF A SYNAPSE (Synaptic Knob and Motor End Plate). CELL MEMBRANE. ACTION POTENTIAL. CENTRAL NERVOUS SYSTEM. Sensorimotor cortex Basal ganglia Cerebellum Brain stem Spinal cord Pyramidal tract Extrapyramidal tract. TYPES OF NEURONS.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' CELL PHYSIOLOGY (Neuron)' - chaim


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Anatomy of a synapse synaptic knob and motor end plate
ANATOMY OF A SYNAPSE(Synaptic Knob and Motor End Plate)

IE 552




Central nervous system
CENTRAL NERVOUS SYSTEM

  • Sensorimotor cortex

  • Basal ganglia

  • Cerebellum

  • Brain stem

  • Spinal cord

    • Pyramidal tract

    • Extrapyramidal tract

IE 552




Excitation contraction sequence 1
EXCITATION-CONTRACTION SEQUENCE #1

  • AP moves down neuron

  • Release of ACH across synapse, receptor

  • Motor end plate P → muscle action P

  • SR releases Ca++ into filaments

  • Inhibits troponin

  • ATP split: ATP∙M → ADP∙Pi∙M

  • A M bonding: ADP∙Pi∙M → A-M∙ADP∙Pi

IE 552


Excitation contraction sequence 2
EXCITATION-CONTRACTION SEQUENCE #2

  • ATP split completely leaving bridge

    A-M∙ADP∙Pi → A-M + ADP + Pi

  • Break AM bond with fresh ATP

    A-M + ATP → A + M∙ATP

  • Myosin advances to next actin, repeat

  • Relaxation, Ca++ released from troponin

  • Ca++ back into SR using ATP

IE 552





Length tension relationship active
LENGTH-TENSIONRELATIONSHIP (Active)

IE 552


Length tension relationship passive
LENGTH-TENSIONRELATIONSHIP (Passive)

IE 552


Length tension relationship combined
LENGTH-TENSIONRELATIONSHIP (Combined)

IE 552


Velocity tension relationship
VELOCITY-TENSION RELATIONSHIP

  • Concentric

  • Eccentric

  • Isometric

  • ↓ bonding

  • Damping

  • Peak power = ⅓ vmax

IE 552


Types of contractions
TYPES OF CONTRACTIONS

  • Static (Isometric) = constant muscle length

  • Dynamic = muscle length changes

    • Concentric = muscle shortens

    • Eccentric = muscle lengthens

    • Isotonic = constant external force

    • Isokinetic = constant velocity

    • Isoinertial = constant acceleration

IE 552


Quick release experiments 1 defines active state
QUICK RELEASE EXPERIMENTS(#1 - Defines Active State)

IE 552


Quick release experiments 2 series elastic component
QUICK RELEASE EXPERIMENTS(#2 – Series Elastic Component)

IE 552



Endurance curves
ENDURANCE CURVES

  • Voluntary hold

  • Static contraction

  • Occlusion of blood flow

  • Rapid fatigue

  • T = 1236 - 72.5

    (%MVC-15)0.618

IE 552


ad