Term 1 Lesson 5: Active Transport

Question 1

What are the 3 different ways things can move across a cell membrane?

Answer 1

• Active transport
• • Diffusion
• Osmosis

Question 2

Diffusion and osmosis move with the concentration gradient:

Answer 2

from high to low

Question 3

Active transport moves** against the concentration gradient**:

Answer 3

Low to high

Question 4

Active transport moves** against the concentration gradient**: from low to high. What does it need to do this?

Answer 4

Energy (ATP) from respiration

Question 5

As well as need energy to move what else is used during active transport?

Answer 5

Carrier proteins to move the substance across the membrane. The proteins change shape to let particles through.

Question 6

Active transport: is the process active or passive?

Answer 6

Active as energy is needed

Question 7

Definition of active transport

Answer 7

The movement of particles against a concentration gradient using energy (ATP) released during respiration’.

Question 8

Give 2 examples of when active transport hppens within the body

Answer 8

• glucose reabsorption in the kidneys from the kidney tubule
• nutrient absorption in the gut.

Question 9

Why do the kidneys reabsorb glucose in the kidneys through active transport?

Answer 9

To make sure glucose is not lost in your urine (wee) because you need it for respiration (energy making)

• There is more glucose outside the kidney than in it, so to remove glucose from the kidney it needs to move from a low to high concentration. Hence, active transport is required

Question 10

State the three methods of movement across the partially permeable cell membrane.

Answer 10

• diffusion
• active transport
• osmosis

Question 11

Name the method of movement of water molecules from an area of high concentration to low concentration through a partially permeable membrane.

Answer 11

Osmosis

Question 12

State the method of transport which moves against the concentration gradient.

Answer 12

Active transport

Question 13

Which method of transport requires energy in the form of ATP?

Answer 13

Active transport

Question 14

True or false. Active transport is a passive process.

Answer 14

False

Question 15

True or false. Active transport requires carrier proteins.

Answer 15

True

Question 17

Name the methods of transport that are passive.

Answer 17

• Diffusion
• Osmosis

Question 18

Fill in the blanks:

There are three ways a molecule can enter a cell through the cell membrane.__________________________________________________________

.Diffusion and osmosis are considered ________________________ because no energy is required. Active transport is an active transport process because ________ is needed.

Answer 18

1. Active transport, diffusion and osmosis
2. Passive
3. ATP

Question 19

What is another name for carrier proteins?

Answer 19

Pumps

pumps move ions (atoms that have lost or gained an electron) and molecules across a cell membrane by active transport.

Question 20

Name the substance that is reabsorbed back into the blood from the kidneys by active transport.

Answer 20

glucose