'Voltage gated' presentation slideshows

Nervous System

1.36k views • 127 slides

Chapter 12: Cardiovascular Physiology

1.07k views • 87 slides

Chapter 12: Cardiovascular Physiology

1.02k views • 87 slides

1. Potassium channel

1. Potassium channel. Function: 1.shape action potentials and set the resting membrane potential 2. maintaining vascular tone 3. secretion of hormones 4. ion transport. Types. Voltage-gated potassium channel Inwardly rectifying potassium channel

993 views • 60 slides

Nerve physiology

Nerve physiology. Physiology of Nerves. There are two major regulatory systems in the body, the nervous system and the endocrine system. The endocrine system regulates relatively slow, long-lived responses The nervous system regulates fast, short-term responses. Neuron structure.

907 views • 57 slides

Electrical and concentration gradient driving forces for Sodium and Potassium

S 8. What would happen to membrane potential if suddenly P Na became very great?. The G-H-K Equation!. Electrical and concentration gradient driving forces for Sodium and Potassium. Why is resting membrane potential closer to E K than E Na ?.

651 views • 51 slides

UNIT V

UNIT V. Cell Signaling Part I. General principles of cell signaling, Extracellular signal molecule and their receptors, Acetylcholine and its receptor Dopamine and its receptor Operation of signaling molecules over various distances, Autocrine, paracrine endocrine

654 views • 48 slides

THE NERVOUS SYSTEM: NEURAL TISSUE

THE NERVOUS SYSTEM: NEURAL TISSUE. Two organ systems coordinate and direct activities of body. Nervous system Swift, brief responses to stimuli Endocrine system Adjusts metabolic operations Directs long-term changes. An Overview of the Nervous System. Divisions of the nervous system.

857 views • 47 slides

Physiology of the Nervous System

746 views • 45 slides

Ion transport across the cell membrane underlies cellular Homeostasis and electrical activity

Week 1 (Chapters 6-7 of KS). Ion transport across the cell membrane underlies cellular Homeostasis and electrical activity. 1.- the cell membrane. 2.- ion transport across membranes. 3.- ion channels structure and function. 4.- osmotic balance and ion channels.

738 views • 42 slides

Introduction Hodgkin and Huxley (1952): - Voltage-clamped squid giant axon

Introduction Hodgkin and Huxley (1952): - Voltage-clamped squid giant axon - Found independent, selective Na + , K + conductances (ionic basis for the action potential)

844 views • 39 slides

The Na + -K + ATPase Pump

The Na + -K + ATPase Pump. Cardiac glycosides: plant and animal steroids Ouabain! Digitalis!:

921 views • 38 slides

Lecture 5: Membrane Transport and Electrical Properties

Lecture 5: Membrane Transport and Electrical Properties. Ion concentrations inside and outside the cells are often different. The relative permeability of a synthetic lipid bilayer. Two main classes of membrane transport proteins. (aka carriers, permases, or transporters). Conformation

534 views • 35 slides

Electrochemical Potentials

Electrochemical Potentials. A. Factors responsible. 1. ion concentration gradients on either side of the membrane. - maintained by active transport. Electrochemical Potentials. A. Factors responsible. 2. selectively permeable ion channels. B. Gradients not just chemical, but electrical too.

558 views • 32 slides

The Nervous System

364 views • 23 slides

Neural Communication: Action Potential

Neural Communication: Action Potential. Lesson 10. Neural Signaling: Axon. Action Potentials propagated electrical signal regenerated Large & rapid changes in E m depolarization repolarization ~. Action Potentials. Electrically-gated channels or voltage-gated Characteristics

378 views • 23 slides

Bi / CNS 150 Lecture 2 Friday, October 4, 2013

315 views • 19 slides

S 1

S 1. Family Weekend Dr. Davis in Office or Lab 10-11:30 am. Concerning Test # 1 Types of questions Recall information Apply to situations Chapter questions Refugee physiology Check Moodle site for 1QQ grades.

309 views • 17 slides

Electrical and concentration gradient driving forces for Sodium and Potassium

S 8. What would happen to membrane potential if suddenly P Na became very great?. The G-H-K Equation!. Electrical and concentration gradient driving forces for Sodium and Potassium. Why is resting membrane potential closer to E K than E Na ?.

598 views • 17 slides

Comparison of K+ and mechano-sensitive ion channels

Comparison of K+ and mechano-sensitive ion channels. Cha et al. Nature 402:813-817. Why compare KcsA and MscS. Voltage gated ion channels are extensively studied by physiological means But the crystal structure is not known X-ray structure of bacterial K+ channel (KcsA) exists

250 views • 13 slides