3.4 - Active Transport

Question 1

Co-Transport

Answer 1

Another name for secondary active transport, using the energy of ion movement.

Question 2

Energy Requirement

Answer 2

Active transport processes need energy input, usually from ATP.

Question 3

Active Transport

Answer 3

Movement of molecules against their concentration gradient, requiring energy input.

Question 4

Antiporter

Answer 4

Carrier molecule that moves solutes in opposite directions,

Question 5

ATPase Enzyme

Answer 5

Transporter/carrier that hydrolyzes ATP to provide energy for active transport.

Question 6

Electrochemical Gradient

Answer 6

Difference in ion concentration and electrical potential across a membrane.

Question 7

Electrochemical Gradients

Answer 7

Both types move solutes against their respective concentration and electrical gradients.

Question 8

Both Energy Requirements

Answer 8

Both active transport types need energy input for solute transportation.

Question 9

Examples of Antiporters

Answer 9

Na+/H+ exchanger, Cl-/HCO3- exchanger, Na+/Ca2+ exchanger.

Question 10

Examples of Primary Active Transport

Answer 10

Na+/K+ ATPase, Ca2+ ATPase, H+ ATPase, H+/K+ ATPase.

Question 11

Examples of Symporters

Answer 11

Na+/glucose cotransporter, Na+/amino acid cotransporter.

Question 12

No Energy Availability

Answer 12

Active transport can’t occur without a source of energy like ATP.

Question 13

Primary Active Transport

Answer 13

Uses ATP as energy source; carrier is an ATPase enzyme; changes conformation with phosphate from ATP.

Question 14

Primary Active Transport source

Answer 14

Uses ATPases as energy source for solute movement.

Question 15

Secondary Active Transport

Answer 15

Uses energy from ion concentration gradients established by primary active transport.