MARINE BIOLOGY
11th Edition
ISBN: 9781259880032
Author: CASTRO
Publisher: RENT MCG
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Chapter 4, Problem 2CT
The cells of some marine organisms have high concentrations of ions found in minute amounts in seawater. Could these organisms accumulate the ions by diffusion? Formulate a hypothesis to explain how this accumulation is accomplished. How might this hypothesis be tested?
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Using the appropriate osmotic terms (hypertonic, hypotonic, or isotonic) describe what would happen to each organism in the following settings:
a. A bunch of carrots are placed soaked a sink of distilled water.
Why can humans not survive by drinking seawater? Explain using osmosis.
Based on the features of the cell membrane explain why water molecules require channel proteins e.g. aquaporin to move across the membrane.
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- Sponges are full of holes, jellyfish are big open sacs, and flatworms are flat. How are these features important in facilitating the process of diffusion?arrow_forwardSuppose that you have a splinter that is embedded so deep in your foot that you cannot remove it with tweezers. How could you use what you learned in this unit as a first-aid remedy in this situation? Select one: O A. Use active transport to your advantage to draw water into your foot. O B. Use osmosis to your advantage by placing your foot in a hypotonic solution. C. Use osmosis to your advantage by placing your foot in a hypertonic solution. D. Use an artificial concentration gradient to draw water into your foot. E. Use osmosis to your advantage by placing your foot in an isotonic solution.arrow_forwardHow does the size of a solute affect the rate of diffusion? Consider the size and shape of a molecule. The shape is the most important part of the question.arrow_forward
- Does polarity affect the rate of diffusion? Explain your answer using scientific principles.arrow_forwardThe image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-C) A. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? B. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? C. Which of these sections are considered passive transport? Explain.arrow_forwardUsing Osmosis, Balance, Compartment, Cell, Water, Permeability, and Membrane in your explanation. Explain why the bolded lines are correct and what would happen internally if you relied on salty ocean water for survival.arrow_forward
- For a lab on diffusion and osmosis, where a egg yolk was placed in a cup water the following question asks Consider a scenario in which the size of an egg yolk remains unchanged after in water soaking for an hour. What are two possible explanations as to why this occurs? What would two reasons be for the yolk to be unchanged after a hour in water?arrow_forwardIf an animal cell was placed in a hypertonic solution, which answers predict what would NOT happen? Osmosis will cause the cell to lose water The cell will expand and possibly die due to the gain of salt by diffusion. The cell will shrivel and possibly die due The cell will not change The cell will shrivel and possibly die due to loss of salt by diffusion. The cell will develop cancer The cell will expand and possibly die due to the gain of water by osmosis.arrow_forwardHow does the size of a solute affect the rate of diffusion? Consider the size and shape of a molecule in your response. Then, does polarity affect the rate of diffusion? Explain your answer using scientific principles.arrow_forward
- Using the appropriate osmotic terms (hypertonic, hypotonic, or isotonic) describe what would happen to each organism in the following settings: A single-celled freshwater protist is placed into a beaker of salt water. A salt-water snail is mistakenly put into a freshwater tank. A head of lettuce is placed soaked in a sink of salt water. A bunch of carrots are placed soaked a sink of distilled water.arrow_forwardThe image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-D) A. 1. Which section represents facilitated diffusion?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not?5. What type of solute molecules may be moved by this type of transport? B. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? C. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? D. Which of these sections are considered passive transport? Explain.arrow_forwardDefine the following terms:a. CFTRb. simple diffusionc. facilitated diffusiond. Na+-K+ pumpe. aquaporinarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license