1.3 Membrane Proteins

Question 1

Facilitated Diffusion

Answer 1

The passive transport of substances across the membrane through
specific transmembrane proteins

Question 2

Integral membrane protein interactions

Answer 2

Hydrophobic R groups allow for strong hydrophobic interactions

Question 3

Peripheral membrane protein interactions

Answer 3

Hydrophilic R groups on surface to allow for mostly hydrogen and ionic bonds

Question 4

Ligand Gated Channels

Answer 4

Controlled by binding of signal molecules

Question 5

Voltage Gated Channels

Answer 5

Controlled by changes in ion concentration

Question 6

Transporter Proteins

Answer 6

Bind to specific substance and undergo a conformational change to transfer the solute across the membrane

Question 7

Active Transport

Answer 7

Uses pump proteins that transfer substances across the membrane against their concentration gradient and requires a source of metabolic energy

Question 8

Electrochemical Gradient

Answer 8

Combination of the concentration gradient and the electrical potential difference that determines the transport of a solute

Question 9

Movement of Sodium and Potassium

Answer 9

3 Sodium Out, 2 Potassium In

Question 10

Main Function of Sodium-Potassium Pump

Answer 10

To maintain osmotic balance

Question 11

Water Channel

Answer 11

Aquaporin