Impulses: Activity 9: The Action Potential: Putting It All Together Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Sensory neurons respond to an appropriate sensory stimulus with a change in membrane potential that is You correctly answered: b. graded with the stimulus intensity. 2. If the depolarization that reaches the axon is large and suprathreshold‚ the result in the axon is You correctly answered: c. action potentials at higher frequency
Premium Action potential Neuron Membrane potential
permeability of a beetroot membrane cell is affected by ethanol. To do this we will investigate different concentrations of alcohol (10-70%) and measure the absorbance using a colorimeter to show us how much juice has leaked out. Hypothesis I predict that as the concentration of ethanol goes up‚ the permeability will increase as the ethanol will slowly dissolve more phospholipids (lipid bilayer) and so more anthocyanin (the beetroot juice) will leak out of the membrane. So at 10% concentration
Premium Cell membrane Cell Lipid bilayer
Akash G 12M 1.0 - Disease 1.1 Pathogens: Pathogens are disease causing microorganisms Disease is the symptoms displayed on a person following an infection‚ a malfunction of the body or mind Infectious Disease: Caused by bacterium‚ virus‚ fungum transferred from one person to another Non Infectious Disease: A disease that is not caused by a transmitted pathogen (e.g. Stroke‚ arthritis‚ obesity) Interface: A surface or boundary between two systems For a microorganism to be a pathogen‚ it
Premium Enzyme Cell membrane Protein
simulate a semi-permeable membrane. Since molecules diffuse from their higher concentration to their lower concentration‚ water will move across the membrane in response to this concentration. While conducting this lab we were able to observe passive transport through diffusion and osmosis. Introduction Osmosis is a specialized case of diffusion that involves the passive transport of water. When osmosis occurs water moves through a selectively permeable membrane from a region of its higher
Premium Osmosis Diffusion Concentration
process of the facilitated diffusion of glucose through a selectively permeable membrane. Introduction: Experiment #1 and #2 are meant to show the processes of Simple and Facilitated diffusion. Both the solutes and water were used to show how they diffuse through a semi permeable membrane. In experiment #1 the process of using the solute and deionized water shows how much of the solute is passed through the membrane. In experiment #2 the rate of facilitated diffusion relied on the amount of carrier
Premium Diffusion Molecular diffusion Semipermeable membrane
hard and fast‚ using more energy and oxygen than normal‚ eventually beginning to cause the cells to die. Both intracellular organelles have membranes. The lack of ATP affects the plasma membrane and that special calcium ATPases had stopped moving calcium from cytosol into the endoplasmic reticulum of his cardiac muscle cells The breakdown of the membranes of these structures affect the functions of his heart cells because they keep everything in order‚ helps to keep organelles organized and enables
Premium Cell Golgi apparatus Organelle
called a membrane. There are many different methods of transport in the cell Saccharomyces cerevisiae (Serrano‚ 1977) We want to know does adding higher concentrations of azide more effectively block dye transport? We tested the transport of dye in yeast cells with a metabolic inhibitor. When we did this we showed no difference in the absorbance between different azide solutions‚ and our control. From this we concluded that azide has no effect on the transport through a yeast cell membrane. Introduction
Premium Yeast Saccharomyces cerevisiae Cell membrane
Covering and Lining Membranes 1. Complete the following chart. Tissue types: membrane composition (epithelial/connective) Membrane Common locations General functions cutaneous mucous serous synovial 2. Respond to the following statements by choosing an answer from the key. Key: a. cutaneous ‚ ‚ ‚ b. mucous c. serous d. synovial 1. membrane type in joints‚ bursae‚ and tendon sheaths 2. epithelium of this membrane is always simple squamous epithelium 3. membrane types not found
Premium Skin
Introduction The purpose of these experiments is to examine the driving force behind the movement of substances across a selective or semiperpeable plasma membrane. Experiment simulations examine substances that move passively through a semipermeable membrane‚ and those that require active transport. Those that move passively through the membrane will do so in these simulations by facilitated diffusion and filtration. The plasma membrane’s structure is composed in such a way that it can discriminate
Premium Protein Cell Cell membrane
across the membrane if there were open Na+ channels? Na+ would diffuse into the cell. 75. Why did the free nerve ending respond to several different modalities? The sensory end of this nerve is less specialized. 76. Why didn’t the Pacinian corpuscle respond to high-intensity light? Light-transducing proteins are not present in the Pacinian corpuscle. 77. Why do you think TTX is not used during dental procedures? TTX irreversibly blocks voltage-gated sodium channels in axonal membranes. Why
Premium Neuron Action potential Nervous system