Chapter 2: Cellular Structure

Question 1

Cytosol vs. Cytoplasm

Answer 1

Cytoplasm = cytoplasm + organelles

Question 2

ICF

Answer 2

Cytoplasm + fluid in nucleus

Question 3

Plasma Membrane considered a ___ ___.

Answer 3

Lipid bilayer

Question 4

Lipids in membrane are

Answer 4

Phospholipids, amphipathic

Question 5

Proteins in membrane allow for

Answer 5

Ion channels, enzymes, signal transporters, cytoskeleton anchors, cell recognition

Question 6

Plasma Membrane Model

Answer 6

Fluid mosaic model

Question 7

Homeostasis requires moving the following through cell membrane:

Answer 7

O2 in, CO2 out, food in, electrical and chemical signals in and out

Question 8

3 ways things can move across plasma membrane

Answer 8

Diffusion, Mediated Transport, Vesicular Transport

Question 9

Diffusion definition:

Answer 9

Random thermal motion of a particle

Question 10

Molecules in diffusion will move from :

Answer 10

High to low concentration

Question 11

Flux will occur in both directions at all times T/F

Answer 11

T

Question 12

At diffusion equilibrium:

Answer 12

Net flux is 0, but both one way flux are going equally

Question 13

Fick diffusion equation

Answer 13

J=PA(C0-Ci)

Question 14

Flux: Definition

Answer 14

The amount of material crossing a unit surface in a unit of time

Question 15

Relation between diffusion time and distance

Answer 15

Diffusion time is proportional to distance squared

Question 16

Plasma Membrane

Answer 16

Forms outer surface of cell and separates cell contents from ECF.