Active Transport

Question 1

What is active transport

Answer 1

The movement of materials or molecules across the cell membrane which requires the use of cellular energy. It typically occurs when molecules are needed in an area regardless of the concentration. At times molecules will move from low concentration to high concentration up the concentration gradient

Question 2

What are types of active transport

Answer 2

Endocytosis, Exocytosis, and Active Transport Pump

Question 3

What is endocytosis

Answer 3

Movement of materials INTO a cell through VESICLES regardless of concentration

Question 4

What are the types of endocytosis

Answer 4

Pinocytosis, Phagocytosis, and Receptor-Assisted

Question 5

What is pinocytosis

Answer 5

Engulfing of tiny liquid droplets by endocytosis (by water)

Question 6

What is phagocytosis

Answer 6

Engulfing of large solid materials by endocytosis (by food or bacteria

Question 7

What is receptor-assisted

Answer 7

Special receptors pick up the materials first then it is engulfed (cholesterol)

Question 8

What is exocytosis

Answer 8

Movement of materials OUTSIDE of a cell through VESICLES regardless of concentration. (movement of proteins such as insulin out of a cell)

Question 9

What is Active Transport Pump

Answer 9

Protein pumps (protein carriers) transport materials across the cell membrane. use a lot of energy because materials are transported AGAINST THEIR CONCENTRATION GRADIENT. example: the sodium pottasium pumps of a nerve cell

Question 10

Why are cells so small?

Answer 10

The smaller the cell, the larger ther surface area to volume ratio. This allows them to obtain nutrients and get rid of wastes much more efficiently.