TEST -BANK FOR - ANATOMY & PHYSIOLOGY= AN INTEGRATIVE APPROACH = 4TH EDITION - MICHAEL MCKINLEY VALERIE O’LOUGHLIN THERESA BIDLE ALL CHAPTERS COVERED. LATEST UPDATE QUESTIONS AND COMPLETE WELL EXPLAINED ANSWERS WITH RATIONALE 100% CORRECT VERIFIED BY EXPERTS AND GRADED A+ LATEST UPDATE 2024[ALREADY PASSED] Chapter 1 Proteins that are embedded within, and extend across, the phospholipid bilayer are called _____ proteins. integral Proteins that assist the movement of a substance across the membrane are called _________ proteins. transport Which type of protein is used by cells of the immune system to distinguish normal cells from foreign or infected cells? Identity markers Movement of a substance from an area of higher concentration to one where it is less concentrated is known as diffusion. Diffusion rate is fastest when the concentration gradient is steepest and temperature is highest. Over time diffusion results in the even distribution of a substance throughout an area. True Which is a passive transport process? Osmosis Channel -mediated diffusion is a subtype of facilitated diffusion. The movement of glucose across a plasma membrane is achieved by facilitated diffusion. When a small, polar solute binds to a membrane protein that then changes shape and transports the solute across the membrane, the process is known as carrier -mediated diffusion. During osmosis, water moves toward the solution with the _________ solute concentration. greater Osmosis is the diffusion of water across a membrane. Water can cross cell membranes only by way of channel -mediated diffusion. False Consider a cell with a total internal solute concentration of 0.9%. Placing the cell in which bath solution would result in creation of the greatest osmotic pressure in the cell? 0.5% NaCl Placing a red blood cell in an extremely hypertonic solution leads to hemolysis. False When a cell is placed in a solution with a very low solute concentration, water diffuses into the cell. Such a solution is called a(n) _________ solution. hypotonic Cell shrinking, also known as crenation, occurs when a cell is placed into a(n) _________ solution. hypertonic The sodium -potassium ATPase functions by performing primary active transport. The sodium -potassium pump moves sodium out of the cell and potassium into the cell. The sodium -potassium pump moves ions against their concentration gradients and helps maintain an electrochemical gradient across the plasma membrane. True Symport active transporters move two substances across the membrane in the same direction. True Coupled transport that involves the moving of one substance against its concentration gradient by using energy from a second substance moving down its concentration gradient is known as secondary active transport.
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