3. Paramecia are unicellular organisms that have contractile vacuoles to remove(pump) excess intracellular water. In an experimental investigation, theseparamecia were placed in salt solutions of increasing concentration. The rate atwhich the contractile vacuole contracted to pump out excess water wasdetermined and plotted against osmolarity of the solutions (increased osmolarity= higher salt concentration), as shown in the graph. What is the best explanationfor the data?Osmolarity of Solution (mM)Your answerRate of Contraction(contractions per minute)

Osmoregulation is the process by which all the cells can establish their water and salt balance such…

Answered: 3. Paramecia are unicellular organisms…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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A phospholipid bilayer separates two chambers. The chambers both contain the same volume of water. The left chamber contains 150 mM of an unknown solute A. Solute B is dissolved in the right chamber also at a concentration of 150 mM. Therefore, the initial osmolarity is the same (isotonic) between the two chambers. However, after a short time, the volume increases substantially in the right chamber. What is the most likely ranking of permeability for the molecules to cause this change? (greater permeability means that the molecule moves first across the membrane)
1.Base on your understanding of plant and animal cell osmosis, what condition do you think plant cells prefer? 2. What condition do you think animal cells prefer? Consider the question: How is solute concentration related to the change in the weight of plant cells (like potato cells)? 5. Write a hypothesis from the above question. Write one if statement and make three predictions(then statements) regarding how the cell will change (weight) in (1) hypertonic,(2) hypotonic, and (3) isotonic conditions:
I don’t understand this
Some animals are osmoconformers, meaning that they maintain the tonicity/osmolarity of their body fluids equal to that of the external environment. Hydroids, a type of cnidarian, are osmoconformers. But they don't move and thus are adapted to the environment they live in. A) What would happen if you take a marine hydroid and transfer it into a freshwater aquarium? B) What would happen if you take a freshwater hydroid and transfer it into a saltwater aquarium? C) Sharks are extraordinary osmoconformers. Bull sharks store urea in their tissues and use it to match the tonicity of their tissues to that of the surrounding environment. Some sharks can move from saltwater to freshwater, hypothesize what changes will sharks do in order to adjust when moving from saltwater to freshwater and vice versa. Explain your answer in terms of tonicity and specify the direction of water movement and urea concentration.
Regarding ISOTONIC solutions, which of the following are TRUE? SELECT ALL THAT APPLY A. Water movement between the ICF and EFC is equal B. Solvent concentration inside the cell and outside the cell are equal. C. Solute concentration inside the cell and outside the cell are equal. D. Solute concentraion inside the cell is equal to solvent concentration outside the cell.
3. Osmosis is also part of the colligative properties of a solution. This time, we are going to relate it using the red blood cells and the different types of solutions namely hypertonic, hypotonic and isotonic solution. Answer the following questions: a. What is the movement of solute particles in osmosis? b. What happens to the sizes of the following red blood cells with the different types of solutions? i. Hypertonic solution ii. Hypotonic solution_ i. Isotonic solution 4. Enumerate at least 3 – 5 practical applications of colligative properties in everyday lives
18.. Use the following diagram to answer the questions. Assume the membrane is semipermeable to glucose, water, and iodine (IKI). A. Which solutes will diffuse into the cell? B. Which solute will diffuse out of the cell? 10% glucose 40% glucose C. Which solute will not diffuse at all? 20% starch 0% starch D. What type of solution (the outside of the cell - hypertonic, isotonic or hypotonic) does the diagram represent? 70% water 50% water 10% IKI E. What color will the cell be at the conclusion of this experiment? What color will the solution in the beaker be? Justify your answer,
The terms below relate to the movement of materials and membranes. Answer the following questions by selecting the correct term.
1 O2 influx _1 Ca2+ influx 3 K+ influx 2 Na+ efflux 1. simple diffusion _1. Na+ influx by itself 2. facilitated diffusion 1 CO2 efflux 3. primary active transport 2 glucose influx by itself 4. secondary active transport 6 steroid influx or efflux 5. endocytosis 3 Ca2+ efflux that consumes ATP 6. eхосytosis 6 efflux of extracellular proteins 4 Na+ influx that occurs with other substances 2 K+ efflux

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