Osmosis in potato cells Aim: To view and examine the effect different concentrations of sucrose solution has on the movement of water across the cell membrane. Hypothesis: That the potatoes will either increase or decrease in mass‚ due to the effect of the different concentrations. Osmosis will occur. Apparatus: * Fresh potatoes * Apple corer * Scalpel * Petri dishes X 10 * 50ml measuring cylinder * Distilled water * Paper towelling * Sucrose solutions:
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Exercise 12: Serological Testing: Activity 1: Using Direct Fluorescent Antibody Technique to Test for Chlamydia Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Which of the following has an epitope? You correctly answered: b. an antigen 2. Chlamydia trachomatis is You correctly answered: c. a bacterium that reproduces inside its host cell. 3. The infectious form of Chlamydia that is spread from person to person is the You correctly answered:
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that maintains the internal environment of the body by selectively excreting or retaining various substances according to specific body needs. The process of urine formation and adjustment of blood composition involves three processes: glomerular filtration‚ tubular reabsorption‚ and tubular secretion. The first part of the process of urine formation occurs in the glomeruli which act as filters‚ allowing water‚ glucose‚ salt and waste materials to pass through to the Bowman’s capsule but preventing
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Exercise 3: Neurophysiology of Nerve Impulses Worksheet Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? No there was no response‚ the line was flat 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0V 3. How does this tracing compare to the one that was generated at the threshold voltage? At 3.5V the high & low peaks were just slightly above and below respectively
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The Muscular System: Skeletal Muscle Tissue 1. Fill in the characteristics of the three muscle types: Muscle Type Cardiac Shape of cell Skeletal branching chains of cells single‚ long cylindrical # of nuclei 15 um in diamter‚ small Striations yes‚ has myofibrils and sarcomers Control involuntary 100 um in size‚ big Smooth single‚ spindle shape cells 2-10 in diameter‚ medium yes‚ presences of myofibrilsno presence of myofibrils and sarcomeres voluntary
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DIFFUSION AND OSMOSIS Chapter 3 of your textbook explains diffusion and osmosis. Diffusion is simply the net movement of atoms or molecules from a region of higher concentration to a region of lower concentration. The force behind the movement is heat or kinetic energy (also called Brownian motion). Diffusion occurs when you spill water on the carpet floor and it spreads out‚ or when you open a bottle of perfume and it leaves the bottle and spreads throughout the air in the room. Osmosis is a similar
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Exercise 1: Cell Transport Mechanisms and Permeability: Activity 5: Simulating Active Transport Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 01/31/13 page 1 Experiment Results Predict Question: Predict Question 1: What do you think will result from these experimental conditions? Your answer : a. Na+ will be maximally transported. Predict Question 2: Do you think the addition of glucose carriers will affect the transport of sodium or potassium? Your answer : a
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Lab Report 1: Cell Transport Mechanisms and Permeability Using PhysioEx 8.0 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
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Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal‚ procedure‚ data analysis method‚ and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report‚ a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual‚ grammatical‚ typographical
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Advanced Placement Biology ® AP Biology Lab 1 281 EDVO-Kit # Storage: Principles & Practice of Diffusion & Osmosis Store entire experiment at room temperature. EXPERIMENT OBJECTIVE The objective of this experiment is to develop an understanding of the molecular basis of diffusion and osmosis and its physiological importance. Students will analyze how solute size and concentration affect diffusion across semi-permeable membranes and how these processes affect water potential. Students
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