Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) • Describe two variables that affect the rate of diffusion: Two variables that affect the rate of diffusion are size and concentration gradient. The molecular size vs the MWCO size of the membrane can either increase‚ decrease‚ or prevent diffusion. The greater the concentration gradient the greater the diffusion rate due to molecules moving from areas of higher concentration
Free Diffusion Molecular diffusion Osmosis
B1: The permeability of the cell increases enormously during the action potential. Comte Whitney Electricity is vital for neural function and communication. The semi-permeable membrane and presence of charged particles in solution (ions)‚ enables the cell to have control of an electric potential. The cell The concentrations of Na+ and K+ ions upon either side of a cell’s membrane are not equal. In order for the equilibrium to be restored‚ sodium will attempt to enter the cell‚ whilst potassium will
Premium Action potential Neuron Nervous system
Accounting 3 & 4 Exercises Set # 1 Lee E. 1. Fred has owned and operated a sole proprietorship for several years. On January 1‚ he decides to terminate this business and become a partner in the firm Sears and Roebucks. Fred’s investment in the partnership consists of P12‚000 in cash‚ and the following assets of the proprietorship: accounts receivable P14‚000 less allowance for doubtful accounts of P2‚000‚ and equipment P20‚000 less accumulated depreciation of P4‚000. It is agreed that the allowance
Premium Accounts receivable Asset Generally Accepted Accounting Principles
Individual Exercise 3 (10 points) 1. A shoe manufacturer’s data show that the distribution of shoe size is normal with a mean of 11inches and SD 1.5 inches. * A manger of the company claims that 70% of the times shoe size will be between 8 and 12 inches. What do you think? In your deliverables‚ write a few lines about what you think of the manager’s claim and what would you advise him to do. (1 point) * How would you modify the manager’s claim if the distribution of shoe size was not
Premium Normal distribution Median Standard deviation
Introduction and Objective The action potential is an impulse of electrical activity. Action potential occurs when a neuron sends messages electrochemically down an axon called a nerve impulse. When a neuron is not stimulated or inactive‚ it is at resting potential. When a neuron is at rest‚ the electrical charge on the inside of the neuron is negative while the electrical charge on the outside of the neuron is positive. The resting membrane potential of a neuron is about -70 mV (mV = millivolts)
Premium Action potential
HANIF MAHEEN YOUSUF LUBNA NASEEM Academic pressure - too much to handle PREVIEW: What is “Academic Pressure”? Effect of academic pressure on Students Parents Faculty Positive effect of academic pressure Causes of academic pressure. Ways to reduce Academic Pressure Conclusion ACADEMIC PRESSURE Academic stress is the anxiety and stress that comes from schooling and education. EFFECTS OF ACADEMIC Pressure: 1) PARENTS Peer Pressure from neighbors and relatives Financial
Free University Effect Management
Activity 1 1. Increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels because the membrane is permeable to K+ ions. Therefore‚ the K+ ions will diffuse down its concentration gradient from a region of higher concentration to a region of lower concentration. 2. Increasing extracellular K+ causes the membrane potential to change to a less negative value because the K+ ions diffuse out across the membrane. My results went well compared to my prediction
Premium Action potential
LORENZO BROWN EN1420 exercise 3.1 Identify the Logical Fallacies 1. Mabel is not qualified to lead the school board because she used to drink liquor in her 20s. A. Ad Hominem; This is under Ad Hominem because the arguer is supporting her claim by pulling information from the her personal life instead of using the knowledge they know about the subject being a leader. 2. A child can be either an athlete or a good student. a. Either-or; this is under the Either-or category because the argument comes
Premium Fallacy Logical fallacies Argument
Activity 1 1. Describe two variables that affect the rate of diffusion. a. There are alot of different variables or factors that can affect the rate of diffusion‚ for example: size of the molecule‚ shape of the molecule‚ concentration gradient‚ charge of the ions‚ temperature‚ environment‚ etc. The rate of the diffusion can increase as diffusion distance increases‚ concentration gradient increases‚ surface area increases‚ temperature increases‚ and many more. 2. Why do you think the urea was not
Free Diffusion Molecular diffusion Osmosis
The purpose of this experiment was to observe the process of diffusion of substances across a semipermeable membrane to gain a better understanding of how cells move materials across cell membranes. The experiment was designed to exhibit Brownian Motion; the random movement and tendency of particles of a substance to move from an area of greater concentration to lower concentration via diffusion until equilibrium has been attained. In addition to observing the passive process of diffusion‚ the experiment
Premium Diffusion Dialysis tubing Semipermeable membrane