What is the difference between hypertonic and hypotonic?

One refers to the same concentration of solutes. The other doesn't

One prevents the solute from escaping the semipermeable membrane

To protect the cell and to make the cell have a stronger membrane

Cells tend to be small, with sizes ranging between 1 and 100 mm. These small sizes help to ensure that cells have a favorable surface-area-to-volume ratio. Choose the statement that explains why a favorable surface-area-to-volume ratio is advantageous.

Higher surface-area-to-volume ratios improve the efficiency of transporting materials in and out of cells.

Lower surface-area-to-volume ratios improve the efficiency of transporting materials in and our of cells.

Higher surface-area-to-volume ratios speed up the flow of cytoplasm within cells.

Higher surface-area-to-volume ratios slow down the flow of cytoplasm within cells.

Which of the following is major cause of the size limits for certain types of cells?

the need for sufficient surface area to support the cell's metabolic needs.

evolutionary progression in cell size; more primitive cells have smaller sizes.

limitation on the strength and integrity of the plasma membrane as cell size increases

the difference in plasma membranes between prokaryotes and eukaryotes

Which way would the purple molecules move through the semi-permeable membrane?

none of the purple molecules would move

they would move equally back and forth in a state of dynamic equilibrium

Which statement about cholesterol molecules is true?

They alter the fluidity of the membrane.

They help hold a membrane together.

They disrupt membrane function.

How do the cell membranes of a hibernating animal change in colder temperatures?

Unsaturated fatty acids make up more of the lipid composition

They release all of their peripheral membrane proteins

Saturated fatty acids are more tightly packed

Integral membrane proteins increase in number

Which statement about diffusion is false ?

Simple diffusion depends upon specific carrier proteins

In diffusion, molecules move from areas of greater concentration to areas of lesser concentration

Diffusion continues until the molecular concentrations are in equilibrium

If a hospital patient is mistakenly given an IV of pure water instead of a saline solution that is isotonic to blood, the patient’s red blood cells will

absorb water from the plasma and eventually burst

release water to the plasma along its concentration gradient

transport equal amounts of water across the cell membrane in both directions

The difference between osmosis and diffusion is that

osmosis refers specifically to the movement of water, whereas diffusion refers to the movement of any type of molecules

diffusion is passive transport, whereas osmosis is active transport

only in diffusion do molecules move from areas of high concentration to areas of low concentration

osmosis is the opposite of diffusion and only involves the movement of water

In a hypothetical study, cells are placed in a solution of glucose in which the concentration of glucose is gradually increased. At first, the rate at which glucose enters the cells is found to increase as the concentration of the glucose solution is increased. But when the glucose concentration of the solution is increased above 10 M, the rate no longer increases. Which of the following is the likely mechanism for glucose transport into these cells?

Facilitated diffusion via a carrier protein

Facilitated diffusion via a channel protein

_____ cells contain an internal membrane system known as the ______ ____ where lipid components of the cell membrane are assembled along with proteins and other materials

Eukaryotic, endoplasmic reticulum (ER)

Prokaryotic, endoplasmic reticulum (ER)

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MS-LS1-2, HS-LS1-3, MS-LS2-3

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Jennifer Duell

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70 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Movement of particles from high to low concentration.

Passive Transport

Active Transport

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Passive Transport

Active Transport

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Osmosis is a form of ______________.

Passive Transport

Active Transport

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Passive Transport

Active Transport

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Solutes move with the concentration gradient, therefore no energy is used.

Passive Transport

Active Transport

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Movement of materials from high to low concentration through a protein channel.

Passive Transport

Active Transport

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Passive Transport

Active Transport

Tags

NGSS.MS-LS1-2

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Exocytosis

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