8. Define homeostasis. maintoining enternal balonce 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?

8. Define homeostasis. maintoining enternal balonce 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 10TYK: Using the principle of diffusion, a dialysis machine removes waste solutes from a patients blood....

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Visit this link (http://openstaxcollege.org/l/diffusion) to see diffusion and how it is propelled by the kinetic energy of molecules in solution. How does temperature affect diffusion rate, and why?
The principal force driving movement in diffusion is the. temperature particle size concentration gradient membrane surface area
Discuss why the following affect the rate of diffusion: molecular size, temperature, solution density, and the distance that must be traveled
1. Where is the cell membrane located? 2. What is the function of the cell membrane? 3. What does selectively permeable mean? 4. What is the difference between active and passive transport?
1. Name the two forms of passive transport. 2. With reference to a named, specific example, describe the processes involved in channel mediated diffusion. In your answe state what kind of transport it is. 3. Explain why the graph obtained for facilitated diffusion when velocity of transport of a given molecule is plotted against its concentration is a hyperbola. In your answer, highlight the events that occur along the hyperbola.
1. Define osmosis, simple diffusion, facilitated diffusion. 2.. Identify why each of these is a form of passive transport. 3. Give examples of each type of passive transport.
Part I – Introduction to Diffusion and Osmosis1. Define the terms diffusion, passive transport, active transport, and osmosis. In each of your definitions, describe the role of a concentration gradient. 2. Biological membranes are said to be selectively permeable (or semi-permeable). What does this term mean, and how does this affect the way that molecules are able to move through cellular membranes? 3. Which type of molecule is more likely to quickly pass through a cellular membrane via simple diffusion, polar or nonpolar? Why? (You may need to use information from your textbook and class discussions to answer this question.)
Match the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicleB. movement down the concentration gradient with a carrier protein, without energy inputC. movement down the concentration gradient without a carrier protein or energy inputD. a particle or substance leaves a cell in a vesicle that merges with the cell membraneE. movement against the concentration gradient with energy inputF. hydrostatic pressure forces substances through membranes
14. Define diffusion, osmosis, facilitated-diffusion, filtration, solute pumps, vesicular/bulk transport, endocytosis, exocytosis, pinocytosis, and phagocytosis. Explain the significance of each and whether it is an active or passive process.
B) Rate of transport into the cll A or B 10 20 30 40 Time (min) The graph directly above shows the rate of substance transport over time when the cells that do not contain the compounds A, B, or C, are placed in 1 mM solutions of A, B, and C, respectively. Based upon these data which of the following is/are compatible modes of transport for substance A? (active transport, facilitated diffusion, simple diffusion) For substance B? For substance C?
3. What is the difference between osmosis and diffusion? Checkpoint: Tonicity For each of the following diagrams, determine the tonicity of the solution. In other words, decide if the solution is hypertonic, hypotonic, or isotonic. Assume the solute cannot diffuse across the membrane. What is the tonicity of this solution? Justify your answer. 60% solute 10% solute 40% water 90% water What is the tonicity of this solution? Justify your answer. 50% solute 50% solute Diffusion, Osmosis, and Tonicity What is the tonicity of this solution? Justify your answer. 20% solute 60% solute 80% water 40% water
THE HUMAN BODY1. Identify the six levels of structural organization that make up the body, and explain how they arerelated.2. What are the five survival needs of the human body? Briefly explain each.3. Explain the following termsa. Homeostasisb. Negative feedback mechanismc. Positive feedback mechanism4. Briefly describe each of the following terms related to membrane transporta. Selective permeabilityb. Simple diffusionc. Facilitated diffusiond. Osmosise. Active transportf. Passive transportg. Exocytosish. EndocytosisMUSCLE ACTIVITY, CONTRACTION, and MOVEMENT1. What are the five major functions of muscles in the body?2. What are the three types of muscle tissues and how do they differ anatomically?3. What are the actin and myosin? What are their roles in muscle movement?REFERENCES: