AnswersAnatomy Physiology ACell Division and Mitosis

Moving Cellular Material Answers

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1
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What is the cell membrane?

A
the center of the cell
B
the boundary of the cell
C
the energy producer of the cell
D
the substance that fills up the cell
2
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The cell membrane is primarily composed of which types of substances?

A
lipids and water
B
proteins and water
C
lipids and proteins
D
proteins and sugars
3

What substances would a cell inside a multicellular organism likely need to let out? Check all that apply.

A
carbon dioxide
B
sugar molecules
C
protein made in the cell
4

Why is it important that the cell membrane is selectively permeable? Check all that apply.

A
It prevents water from leaving the cell.
B
It allows nutrients to enter the cell.
C
It provides a barrier against disease-causing agents.
D
It enables cells to interact with their environment.
5

Passive transport can be explained by which statement?

A
Particles move randomly.
B
Energy is used to move particles.
C
Large particles can move into cells.
D
Particles are moved to areas of higher concentration.
6

Two tanks (tank A and tank B) of pure water are connected by a small hose. Water can flow freely between the tanks. A container of sugar is poured into the water in tank A. Based on the process of osmosis, what will happen to the sugar concentrations over time?

A
The sugar concentrations in both tanks will be equal.
B
The sugar concentration in tank A will be higher than in tank B.
C
The sugar concentration in tank B will be higher than in tank A.
7

Which types of molecules are able to diffuse across the cell membrane?

A
water molecules
B
small molecules
C
very large molecules
D
fat-soluble molecules
8

Use the drop-down menus to select the best answers. Osmosis is the diffusion of a saltsolutesolventprotein.Osmosis helps to balance out the concentrations of:waste productsfat-soluble moleculesparticles in the cell membraneparticles that cannot cross the membrane

A
salt
B
solute
C
solvent
D
protein
9

A patient is given a glass of pure water to drink. The patient’s cells are now in a hypotonic solution. What will happen to the patient’s cells?

A
Water will move into the cells.
B
Water will move out of the cells.
C
Water will not move in either direction.
10

A student places a group of cells in an unknown solution whose solute is unable to pass through the cell membrane. After an hour, the student notices the cells have lost water. What does this tell the student about the unknown solution?

A
The unknown solution was isotonic.
B
The unknown solution was hypertonic.
C
The unknown solution was hypotonic.
11

How is facilitated diffusion different from the sodium-potassium pump?

A
Facilitated diffusion transports water.
B
Facilitated diffusion does not use energy.
C
Facilitated diffusion does not use membrane proteins.
D
Facilitated diffusion moves particles from low concentrations to high concentrations.
12

Which is true about both endocytosis and exocytosis? Check all that apply.

A
They use vesicles for cell transport.
B
They require energy for cell transport.
C
They remove wastes from the cell.
D
They move small, fat-soluble substances.
13

A single-celled organism is able to engulf large solid particles from its environment. The organism relies on the process of

A
osmosis.
B
pinocytosis.
C
phagocytosis.
D
facilitated diffusion.
14

If a substance is transported across a cell membrane from an area of low concentration to an area of high concentration, you know that

A
it is a type of active transport.
B
it is a type of passive transport.
C
it could be active or passive transport.
15

Which of the following are types of passive transport? Check all that apply.

A
osmosis
B
diffusion
C
phagocytosis
D
facilitated diffusion
E
endocytosis
F
exocytosis
16

A cell containing substance A is placed in a solution containing a lower concentration of substance A. Substance A can diffuse across the cell membrane. What will happen in this scenario?

A
Substance A will absorb the solution.
B
Substance A will remain unchanged.
C
Substance A will move into the cell.
D
Substance A will move out of the cell.
17

Why does glucose transport require facilitated diffusion instead of diffusion?

A
Glucose does not randomly move like other particles.
B
Glucose needs energy to cross the membrane.
C
Glucose is only transported outside the cell, not into the cell.
D
Glucose is too big to pass through the membrane on its own.
18

Receptor-mediated endocytosis differs from other types of endocytosis in that

A
the process does not require the cell to use any energy.
B
the particle coming into the cell is called a protein receptor.
C
the process can move particles into the cell or out of the cell.
D
the particle coming into the cell first binds to a protein on the cell membrane.
19

What do pinocytosis and phagocytosis have in common?

A
They are both forms of endocytosis.
B
They are both types of passive transport.
C
They both involve the movement of liquids.
D
They both move particles toward the extracellular space.

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