3.3 active transport

Question 1

define active transport

Answer 1

the movement of molecules and ions in or out of a cell through the cell membrane against a concentration gradient, using energy from respiration

Question 2

what is active transport?

Answer 2

an energy-consuming process by which substances are transported against their concentration gradient; this energy is provided by respiration in the cell

Question 3

what are examples of active transport?

Answer 3

uptake of glucose by epithelial cells in the villi of the small intestine; uptake of ions from soil water by root hair cells in plants

Question 4

_______ pick up specific molecules and take them through the cell membrane against the concentration gradient.

Answer 4

Carrier proteins