Nephron * Basic structural and functional unit of kidney * Regulate concentration of water and soluble substances * FUNCTION: Eliminates waste‚ regulates blood pressure‚ regulates blood PH‚ controls levels of electrolytes and metabolites A. Urine Formation FILTRATION - plasma filtered from glomerulus into Bowman’s capsule * Blood pressure forces filtrate through filtration slits between podocytes of Bowman’s capsules. * Approx 20% of blood plasma is non-selective filtered
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Lab Report on Osmosis and Diffusion Biology 1‚ Period 3 March 15‚ 2010 Lab Team: Jason Perez‚ Kicia Long‚ Chris McLemore Purpose: The purpose of this lab is to observe the acts of passive transport: diffusion and osmosis in a model membrane system. The experiment will show how molecules in solution move from areas of higher concentration to areas of lower concentration. The model membrane is dialysis tubing. Materials Used 2.5 cm dialysis tubing 15% glucose
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answer: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is Your answer : b. the concentration of diffusing solutes. Correct answer: a. the concentration of nondiffusing solutes. 4. The net movement of water would be into the cell in a You correctly answered: b. hypotonic solution. 02/04/15 page 1 Experiment Results Predict Question: Predict Question
Free Diffusion Molecular diffusion Osmosis
osmosis. Osmotic pressure refers to tendency for a liquid solution to diffuse therefore moving from a lower to higher concentration across a membrane. As it is critical for humans to maintain a regulated osmotic pressure they are able to gain an isotonic solution which would mean that there is no total loss or gain of fluids or salts into the cells of the body. Rather there is a steady and constant flow of substances in and out of the cell membrane. There are a few types of osmoregulation; these
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13A – Cells and Movement of Materials P1: Describe the microstructure of a typical animal cell and the main function of the cells components The microstructure of a typical animal cell is made up of various components‚ all of which play a vital role within the body. Each component has its own specific role that it performs in order for the cell to function and maintains the cell membrane. The main components of the cell include the cell membrane‚ cytoplasm‚ the nucleus‚ nucleolus‚ nuclear membrane
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Cell Biology Exam 1 Notes Lecture 1: Introduction to Cell Biology • Biology is studied at different levels of organization Time Scale • [Figure 1-9] How big is a cell and how big are its parts? • There are important similarities that all cells share; however‚ there are also important differences among various cell types (for example‚ animal cells vs. bacterial cells) • [Figure 3-23] The inside of a cell is loaded (crowded
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PROCEDURE: Part A (Effect of temperature on growth) 1) 15 tubes of glucose broth are provided and one set of 3 tubes are inoculated with each of the following cultures; Escherichia coli‚ Pseudomonas fluorescens‚ Micrococcus luteus and Saccharomyces cerevisiae. The last served as control. 2) One of the three tube of each culture is incubated at each of the following temperature: * 4°C * 37°C * 55°C 3) All the tubes are incubated within 5 minutes after inoculating. The turbidity
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The nurse is performing her admission assessment of a patient. When grading arterial pulses‚ a 1+ pulse indicates: Above normal perfusion. Absent perfusion. Normal perfusion. Diminished perfusion. Murmurs that indicate heart disease are often accompanied by other symptoms such as: Dyspnea on exertion. Subcutaneous emphysema. Thoracic petechiae. Periorbital edema. Which pregnancy-related physiologic change would place the patient with a history of cardiac disease at the greatest risk of
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correctly answered: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is You correctly answered: a. the concentration of nondiffusing solutes. 4. The net movement of water would be into the cell in a Your answer : d. hypnotonic solution. Correct answer: b. hypotonic solution. 01/20/14 page 1 Experiment Results Predict Question: Predict Question
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significantly from those of all other sucrose concentrations. The osmotic concentrations were greater than zero in sucrose solutions of 0‚ 0.1‚ and 0.2 M; these cells were hypertonic‚ meaning the solutions had more solute. The osmotic concentrations were less than zero in sucrose solutions of 0.3‚ 0.4‚ and 0.5 M; these cells were hypotonic‚ meaning the solutions had less solute. Osmotic concentration decreased as sucrose concentration increased and cells became more concentrated. Figure 1. The
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