25S1 W4 membranes & Transport

Multiple Choice

The function of the plasma membrane is to:

• regulate what enters and leaves the cell.

• fight bacteria and viruses that enter the cell.

• provide rigid support and protection to the cell.

• make sure each cell can move

Multiple Choice

Identify the part of the membrane identified as A.

• carbohydrate
• cholesterol
• protein
• phospholipid

Multiple Choice

The arrow is pointing to the

• hydrophobic head

• hydrophilic head

• hydrophobic tail

• hydrophilic tail

Multiple Choice

Identify cholesterol molecule

• structure a

• structure b

• structure h

• structure i

Multiple Choice

What is the function of cholesterol in a plasma membrane?

• To make the membrane flexible

• To control the effect of temperature changes

• To attract water molecules

• To allow nutrients and other essential molecules into the cell

Multiple Choice

Identify a peripheral protein

• structure a

• strucure b

• structure g

• structure h

Multiple Choice

The arrow is pointing to the

• hydrophilic head

• hydrophobic head

• hydrophilic tail

• hydrophobic tail

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Multiple Choice

Which of the following best describes how water will flow through the membrane?

• The water levels are already equal so water will not flow through the semipermeable membrane.

• Water will flow from side A into side B.

• Water will flow from side B into side A.

Multiple Choice

Which osmotic solution is (a)?

• hypertonic

• hypotonic

• isotonic

Multiple Choice

Which osmotic solution is (b)?

• hypertonic

• hypotonic

• isotonic

Multiple Choice

Which osmotic solution is (c)?

• hypertonic

• hypotonic

• isotonic

Multiple Choice

An animal cell has a 2% percent salt concentration. It is placed into a solution with a 0.05% percent salt concentration. What will happen to the animal cell?

• Water will move out of the animal cell, causing it to shrivel

• Water will move into the animal cell, causing it to shrivel

• Water will move out of the animal cell, causing it to swell and burst

• Water will move into the animal cell, causing it to swell and burst

Multiple Select

Which statements are true about active transport? (select all that apply)

• molecules move from low to high concentration

• molecules move from high to low concentration

• ATP is required

• ATP is not required

Multiple Choice

What are the three types of passive transport?

• osmosis, diffusion, active transport
• active transport, facilitated diffusion, osmosis
• diffusion, osmosis, facilitated diffusion
• facilitated diffusion, active transport, diffusion

Match

Match the following types of transport to their descriptions:

• Movement from high to low concentration

• Diffusion of water

• Diffusion with the help of a transport protein

• Transport of large molecules into the cell

• Transport of large molecules out of the cell

Diffusion

Osmosis

Facilitated diffusion

Endocytosis

Exocytosis

• Diffusion

• Osmosis

• Facilitated diffusion

• Endocytosis

• Exocytosis

Multiple Choice

Which form of active transport is being shown?

• Pinocytosis
• Endocytosis
• Exocytosis
• Osmosis

Multiple Choice

Which type of passive transport is being represented in this picture?

• Passive diffusion

• Simple diffusion

• Active diffusion

• Facilitated diffusion