Bio (Exam 3) Cell Transport

Question 1

Passive Transport

Answer 1

Requires no energy

Molecules are being moved from HIGH to LOW

Question 2

Active Transport

Answer 2

Requires energy (usually ATP)

Molecules being moved from LOW to HIGH

Question 3

How can compounds enter the cell?

Answer 3

Passive or Active Transport

Question 4

Simple Diffusion

Answer 4

Diffusion of molecules with NO HELP

Question 5

Facilitated Diffusion

Answer 5

Diffusion of molecules WITH HELP

Question 6

Channel Proteins

Answer 6

Move like a tunnel

• continuous transport of molecules
• only used for passive
• can be open or closed

Question 7

Carrier Proteins

Answer 7

Move like a fairy carrying cars over

• changes shape
• during transport
• trasnports molecules one at a time (small groups)

Question 8

Active Transport

Answer 8

cells can move substances AGAINST their concentration gradient from low to high

Question 9

Primary Active Transport

Opposite of Secondary Active Transport

Answer 9

uses ATP directly to move molecuels from [low] concentration to [high] concentration

Question 10

Secondary Active Transport

Opposite of Primary Active Transport

Answer 10

uses ATP indirectly to move molecules

Question 11

Endocytosis

Endo = inside
tosis = cell process

Answer 11

imports into cell

Question 12

Types of Endocytosis

Hint: 3

Opposite of Exocytosis

Answer 12

1. Phagocytosis “eat”
2. Pinocytosis “drink”
3. Receptor mediated endocytosis - engulfing specific molecules

Question 13

Exocytosis

Exocy = outside

Opposite of Endocytosis

Answer 13

bulk transport out of cell

Question 14

Passive Transport (NO energy required)
examples:

Answer 14

Simple and facilitated diffusion

simple - needs help
facilitated - no help

Question 15

Simple diffusion transport what type of molecules?

Answer 15

small and hydrophobic

Question 16

Facilitated diffusion transport what type of molecules?

Answer 16

large and hydrophilic (polar/charged)

Question 17

Which of the following would be able to move directly across the membrane via simple diffusion?

a. starch
b. polypeptide
c. glucose
d. chloride
e. nitrogen molecule (N2)

Answer 17

e. Nitrogen Molecule (N2)