Lab 3 Quiz

Question 1

Brownian Motion

Answer 1

zigzag motion of particles resulting from colliding with smaller particles

Question 2

Simple Diffusion

Answer 2

Passive Transport; Molecules simply move from where they are more concentrated to where they are less concentrated, down the concentration gradient

Question 3

Facilitated Diffusion

Answer 3

ions/molecules require the aid of a membrane-protein to move in or out of the cell

Question 4

Equilibrium

Answer 4

equally concentrated throughout

Question 5

Selectively Permeable Membrane

Answer 5

‘selects’ what can enter and exit the cell

Question 6

Hypertonic

Answer 6

HIGH SOLUTE (i.e. salt) concentration and LOW WATER (solvent)

in hypertonic solution, cells lose water by osmosis and shrink

Question 7

Hypotonic

Answer 7

HIGH WATER (solvent) concentration and LOW SOLUTE (i.e. salt)

in hypotonic solution, cells take in water and bloat until they burst.

Question 8

Isotonic

Answer 8

equal solution concentration (equilibrium)

Question 9

Crenate

Answer 9

when a cell loses water and shrinks (hypertonic solution)

Question 10

Lyse

Answer 10

when a cell gains water and bursts (hypotonic solution)

Question 11

Filtration

Answer 11

passive transport process where water and solutes move from an area of higher hydrostatic (fluid) pressure to an area of lower hydrostatic (fluid) pressure. The water and solutes will move through pores in the membrane, down a pressure gradient.

ex: coffee filtering

Question 12

Hydrostatic Pressure

Answer 12

pressure that is exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity.

Question 13

Stages of Mitosis

Answer 13

PMAT
prophase
metaphase 
anaphase
telophase

Question 14

Prophase

Answer 14

centrioles move to opposite poles,
chromatin condenses into visible chromosomes, mitotic spindles (microtubules) form nuclear envelope, and nucleolus disappear

Question 15

Metaphase

Answer 15

sister chromatids line up at the metaphase plate (equator) of the cell

Question 16

Anaphase

Answer 16

sister chromatids separate and are pulled toward opposite poles of the cell

Question 17

Telophase

Answer 17

chromosomes relax to form chromatin spindle, microtubules disappear, nuclear envelope and nucleolus reappear, cleavage furrow forms (a “pinching-in” of the plasma membrane that eventually separate the two daughter cells)

Question 18

Cytokinesis

Answer 18

Division of the cytoplasm after telophase