Cell Membrane & Transport

Question 1

What are cell membranes comprised of?

Answer 1

Phospholipid bilayer

Question 2

Phospholipid bilayer

Answer 2

Made up of a hydrophilic phosphate head and hydrophobic fatty acid tails

Question 3

Cell membrane function

Answer 3

Controls traffic in/out of the cell, separates living cell from aqueous environment

Question 4

Transmembrane proteins

Answer 4

Embedded in the cell membrane and creates semipermeable channels

Question 5

Peripheral proteins

Answer 5

loosely bound to the outside of the membrane examples are identity markers

Question 6

Integral proteins

Answer 6

across the entire membrane, examples are transport proteins or transmembrane proteins

Question 7

Components of the cell membrane

Answer 7

cytoskeleton, proteins, cholesterol, lipids

Question 8

Membrane carbohydrates function

Answer 8

helps with cell-to-cell recognition, organ/tissue development

Question 9

Simple diffusion

Answer 9

high to low concentration; diffusion of nonpolar hydrophobic

Question 10

Facilitated diffusion

Answer 10

diffusion through protein channels; high to low

Question 11

Active transport

Answer 11

Cells might need to move against the concentration gradient; low to high, protein pump & ATP

Question 12

endocytosis

Answer 12

A form of active transport that moves large particles of a cell from the outside into the cell using vesicles.

Question 13

exocytosis

Answer 13

contents of a vacuole are released out of the cell

Question 14

phagocytosis

Answer 14

fuses with lysosomes for digestion

Question 15

pinocytosis

Answer 15

ingestion of liquid into the cell with the help of lysosomes

Question 16

What does cholesterol do for the membrane?

Answer 16

Help keep phospholipids together and not drift apart

Question 17

Glycolipid

Answer 17

Important for signaling