Physiology lecture 2_Cell Membrane

Question 1

Peripheral protein

Answer 1

protein that exists within the plasma membrane on the ECF side only.

Question 2

Integral protein

Answer 2

Protein that transverses the entire plasma membrane

Question 3

What are the 5 factors that affect simple diffusion of a molecule through a cell membrane

Answer 3

1) lipid solubility
2) Molecular size
3) Concentration Gradient
4) Membrane surface area
5) Composition of lipid layer

Question 4

What is facilitated diffusion

Answer 4

It is typically defined as diffusion down a concentration gradient through protein channels that do not require energy to activate

Question 5

Define Primary active transport

Answer 5

It is the transport of ions against their concentration gradient using the direct input of ATP (example Na K ATPase)

Question 6

Define secondary transport

Answer 6

The active transport of an ion against its concentration gradient through coordinated movement with another ion moving down its respective consentration gradient

Question 7

Define symporter

Answer 7

a secondary active transport where both types of ions move in the same direction

Question 8

Define anti porter

Answer 8

a secondary transport where each type of ion moves opposite eachother.