Neurophysiology of Nerve Impulses ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative
Premium Action potential
Materials: Isoamyl Alcohol Acetic Anhydride Concentrated H2SO4 Saturated NaHCO3 NaCl solution Reflux Setup: The reflux setup contains a condensing system at a 90-degree angle with the flasks that prevents the solvent from evaporating but at the same time maintaining the temperature of the solvent. The 90-degree angle allows condensed solvent to go back to the reaction pot. PROCEDURE Two dry test tubes labelled A and B containing the required 2.5 mL isoamyl alcohol and 2.6
Premium Acetic acid Ester Carboxylic acid
PhysioEx 9.0 Exercise 3 Neurophysiology of Nerve Impulses A C T I V I T Y 1 The Resting Membrane Potential 1. Explain why increasing extracellular K_ reduces the net diffusion of K_ out of the neuron through the K_ leak channels. Increasing the extracellular potassium reduces the concentration gradient‚ and less potassium diffuses out of the neuron and into the cell. 2. Explain why increasing extracellular K_ causes the membrane potential to change to a less negative value.
Premium Action potential
1.TITLE: To prepare isopentyl acetate (isoamyl acetate) 2. AIM: To make an ester referred to as banana oil from acetic acid and isopentyl alcohol 3.THEORY: This ester is often referred to as banana oil‚ since it has the familiar odor of this fruit O O CH3 H+ CH3 CH3C OH +
Premium Acetic acid Distillation Ester
Chapter 1 INTRODUCTION Wine is an alcoholic beverage produced through the partial or total fermentation of grapes‚ other fruits and plants such as berries‚ apples‚ cherries‚ dandelions elder berries ‚ palm and rice can also be fermented. Grapes belong to the botanical family vitaceae of which there are many species. The species that are most widely used in wine production are Vitislabrusca and specially Vitisvinefara‚ which has long been the most widely used wine grape throughout the world
Premium Wine
ACTIVITY 1: THE RESTING MEMBRANE POTENTIAL 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out the neuron through the K+ leak channels? When the diffusion is greater on one side‚ the other side will slow down. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your predictions? There are two potassium’s for every sodium so the increase of potassium will make it more
Premium Action potential
Session 9: The Nervous System - Assignment #2 PhysioEx Assignment : Exercise 3 Neurophysiology of Nerve Impulses Activity 1: The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Increasing the extracellular K+ causes the membrane potential to change to a less negative value because when K+ ions diffuse out across the membrane they are leaving behind a net negative charge. 2. Explain
Premium Action potential
Virtual Lab Stimulation Exercise 3 Activities 1-5 Study online at quizlet.com/_cfevi 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. An action potential is an "all-ornothing" event. Explain what is meant by this phrase. This means that once the threshold is met‚ an action potential occurs. If the stimulus is too small an action potential does not occur. An action potential is usually initiated in an axon at or near what? The axon hillock‚ the initial segment‚ and the trigger zone. The adequate stimuli
Premium Neuron Action potential Nervous system
Title: DNA analysis Aim: a) Isolate and Purify Bacterial Chromosomal DNA from a strain of E.coli b) Visualization of restriction fragments by Agarose Gel electrophoresis Objectives: * to isolate and purify bacterial chromosomal DNA from a strain of E.coli * to analyze and identify DNA by use of a spectro-photometer * to use restriction enzymes to cleave DNA into fragments * to visualize the restriction fragments by gel electrophoresis * to compare the different
Premium DNA Molecular biology
Banana (Musa spp.) is one of the most produced and widely consumed by worldwide market; and was originally descendent from hot and tropical region in South East Asia. For over 200 species were discovered which contributes to various cultivar with different types of characteristics and appearances tagged along the traits (Salunke‚ 1984). Banana came from family Musaceae genus and scientifically named as Musa paradisiacal L. In Malaysia‚ the diversity of banana can be proofed by the cultivars of diploid
Premium Banana