1.4 Cell Membranes and Diffusion Principles Part 2

Question 1

What does it mean to be hypotonic?

Answer 1

contains less solute particles

Question 2

If a cell is placed in a hypertonic solution, which way will water move?

Answer 2

water will move outside of the cell

Question 3

What is facilitated diffusion?

Answer 3

diffusion of lipid insoluble molecules across a cell membrane using carrier proteins

Question 4

What is active transport?

Answer 4

movement of molecules or ions down their concentration gradient requiring carrier proteins and energy

Question 5

What type of cell membrane movement is the sodium potassium pump?

Answer 5

active transport

Question 6

What is the main function of the Na/K pump?

Answer 6

maintain electrical imbalance across the membrane

Question 7

Which direction does Na and K move in the Na/K pump?

Answer 7

Na out of the cell and K into the cell

Question 8

What are the special methods of transport across the cellmembrane??

Answer 8

endocytosis
exocytosis

Question 9

What is exocytosis?

Answer 9

biomacromolecule is enclosed inside of the membrane of a vesicle which fuses with the cell membrane and ejects the biomacromolecule outside of the cell

Question 10

What is endocytosis?

Answer 10

when a biomacromolecule outside of a cell is enclosed in an invagination of the cell membrane forming a vesicle inside of the cell

Question 11

What are the three specialized transportation methods of endocytosis?

Answer 11

pinocytosis
phagocytosis
receptor-mediated cytosis

Question 12

What is phagocytosis?

Answer 12

movements of large objects into the cell which then fuse with lysosomes

Question 13

What is pinocytosis?

Answer 13

movement of fluid into the cell