Mastering A & P Homework

Question 1

A primary active transport process is one in which __________.
A. an intracellular vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid
B. molecules move across the plasma membrane without an input of energy
C. molecules move through transport proteins that have been activated by ATP
D. the plasma membrane folds inward to form a vesicle containing extracellular material
E. molecules pass directly through the phospholipid bilayer of the plasma membrane

Answer 1

C. molecules move through transport proteins that have been activated by ATP

Question 2

Some transport processes use transport proteins in the plasma membrane, but do not require ATP. This type of transport is known as _____.

Answer 2

facilitated diffusion

Question 3

The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____.

Answer 3

facilitated diffusion

Question 4

The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. This statement describes _____.

Answer 4

primary active transport

Question 5

A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. This statement describes _____.

Answer 5

exocytosis

Question 6

In the process called facilitated diffusion, what limits the rate of transport into the cell at any given moment?

Answer 6

the number of suitable carrier proteins

Question 7

Of the three major fluid compartments in the body, what is the fluid that surrounds the cells called?

Answer 7

interstitial fluid