BIOL 1001 : Biology 1001 Test 3

10 views6 pages

azuremammoth471

15 Mar 2019

School

Department

Course

Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Document Summary

Cells without cell walls are not tolerant to excessive water movements. Isotonic environment: no net movement of water, and the cell volume remains stable. An equal concentration of solute compared to the inside of a cell. S greater concentration of solute than the inside of a cell. Hypotonic environment: water moves into the cell, the cell swells and eventually burst. A lower concentration of solute that the inside of a cell. These are relative terms comparing one side of the membrane with the other. Cells with cell walls are more tolerant to excessive water movements, but still exhibit cellular changes. Isotonic environment: no net movement of water and the cell becomes flaccid or limp. Hypertonic environment: water moves out of the cell and the cell shrivels. Hypotonic environment: water moves into the cell. This is the ideal state for most plants. Plants maintain this state by being hypertonic compared to their environment.

Related Questions

1,Match the descriptions to the type of transport.

- A. B. C.	Water enters a cell because it is hypertonic compared to the extracellular environment, increasing its turgor pressure
- A. B. C.	Water enters guard cells because the guard cells are hypertonic compared to the surrounding cells
- A. B. C.	Potassium ions are pumped into guard cells
- A. B. C.	The motor cells of a Venus fly trap are hypotonic compared to surrounding cells, causing water to leave the motor cells
- A. B. C.	Sugar is loaded into the phloem

A.	Both active and passive transport
B.	Passive Transport
C.	Active transport

2,Describe what is wrong with the following statement and explain why:

All prokaryotic and eukaryotic cells contain plasma membrane, nucleus, ribosomes, organelles, cytoplasm, and cell walls.

What is short-distance transport?

	a,	The movement of solutes from a region of low concentration to a region of high concentration
		b,The movement of water, nutrients, and other substances between cells
c,		The movement of substances from a region of high concentration to a region of low concentration
d,		The movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

What terms describe the movement of water across a semipermeable membrane from a region of high water concentration towards a region of low water concentration (and high solute concentration.)

What is found in the proptoplasm?

Cell wall, cytoplasm, plasma membrane, nucleus, and other cell organelles

Plasmodesmata, cell wall, and plasma membrane

Cell wall, cytoplasm, and plasma membrane

Cytoplasm, nucleus, and other cell organelles

The channels that allow nutrients and protoplasm to pass between plant cells are called _________________.

What happens when a plant cell is placed in a hypotonic solution?

Water will enter the plant cell and the plasma membrane will swell and cell lysis will occur

Water will leave the plant cell and the plasma membrane will pull away from the cell and plasmolysis will occur

Water will enter the plant cell and the plasma membrane will swell and push against the cell wall

Water will leave the plant cell and the plant cell will lose turgor pressure, causing the plant to wilt

________________ transport uses cellular energy.

What molecules make plasma cell membranes hydrophilic on the outside and hydrophobic on the inside?

What type of cells do plants have?

		Bacterial
		Archaeic
		Eukaryotic
		Prokaryotic

1. Microscopic cells or particles suspended in water exhibit atype of movement known as

_______________________________________________________________________.

2. The yeast cells in suspension appear to jiggle back and forthbecause they are bombarded

by the ______________ energy of water molecules which are inconstant, rapid, random

motion.

3. The movement of the molecules of a gas, liquid, or solid froma region of higher

concentration of that substance to a region of lesserconcentration is termed

____________________________.

4. What are 2 factors that influence the rate of diffusion?

5. ______________ is the diffusion of a solvent across aselectively permeable membrane.

6. In ______________________, water moves out of a plant cell byosmosis causing the

protoplast to shrivel up.

7. In __________________, water moves into an animal cell byosmosis causing the cell to

swell and burst.

8. The process of ________________ can be used in treatingkidney patients to separate

urea (small molecules) from proteins (large molecules) using aselectively permeable

membrane.

9. Which type of solution (hypotonic or hypertonic) is formed inthe soil environment

around root cells when a lawn is over fertilized? Would the rootcells lose or gain water?

10. Why is it common practice to place lettuce and celery inwater before serving them?

orchidbear657

True or False: The solution of salt water inside of the hollowpotato has a lower concentration of water molecules so the water onthe outside of the potato should move into the potato cells. Or thewater molecules inside of the grape or pea will move to the outsidewhere there are fewer water molecules and more salt.

True or False: The water on the inside of the potato with thesalt molecules is an isotonic solution the same as the solution onthe outside of the potato.

True or False: Water will not move by simple diffusion (osmosis)into or out of cells it requires energy or proteintransporters.

T or F The salt and water solution inside of the hollow potatois a hypotonic solution.

T or F: Osmosis is the movement of large molecules across a semipermeable membrane which require embedded proteins.

T or F The plain water in this experiment is the solvent and thesalt is the solute.

T or F Active transport requires no energy and the moleculesmove with the concentration gradient from low concentration to ahigh concentration.

T/F Passive transport requires no energy and the molecules movewith the concentration gradient or from high concentration to lowconcentration

T/F A hypotonic solution has a higher level of solutes so thewater moves out of the cells to the surroundings.

T/F A hypertonic solution has a higher level of solutes so thewater moves out of the cells to the surroundings.

Why does a slug die when you put salt on her/him? (Think aboutwhat happened in this lab) :

A. The salt on the outside of the slug causes the water frominside of the cells to move out of the cells. The dehydration ofthe slug causes death

B. The slug does not die but becomes enlarged from the movementof water into the slug cells caused by a hypertonic solution

C. The salt and moisture on the outside of the slug cause anisotonic state and the water leaves the slug quickly byosmosis.

D. Sigh. The poor slug, sacrificed for science by many youngnature lovers around the world. Obviously this happens as theoutside solution is hypotonic and the inside of the slug's cellsare hypertonic. Energy is used for active transport leading toosmosis.

lemonbeetle571

BIOL 1001 : Biology 1001 Test 3

Document Summary

Get access

Related Documents

BIOL 1001 : Bio 1001 Notebook Test 2

BIOL 1001 : Test 2

BIOL 1001 Chapter : Learning Objectives

Related Questions