Question

a. selectively permeable
b. diffusion
c. active transport
d. endocytosis
e. equilibrium
f. exocytosis
g. phagocytosis
h. facilitated diffusion

1. movement of molecules from high to low concentration ____

1. uses membrane channels but no energy ____

1. requires energy to move substances ____

1. cell surrounds and takes material in ____

1. cell expels large materials ____

1. cell \eating\ large particles ____

1. concentration is the same on both sides ____

1. membrane allows some substances through ____

Explanation:

(Question 23):
The question is about the movement of molecules from high to low concentration. Diffusion is defined as the movement of particles from an area of higher concentration to an area of lower concentration. So the correct option is B. diffusion.

(Question 24):
This question is about a process that uses membrane channels but no energy. Facilitated diffusion is a type of passive transport (so no energy) that uses membrane proteins (channels or carriers) to move substances across the membrane. So the correct option is H. facilitated diffusion.

(Question 25):
The question is about a process that requires energy to move substances. Active transport is the movement of substances against their concentration gradient (from low to high) and it requires energy (usually ATP). So the correct option is C. active transport.

(Question 26):
The question is about a cell surrounding and taking material in. Endocytosis is the process by which a cell takes in substances by engulfing them in a vesicle. So the correct option is D. endocytosis.

Answer:

(Question 23):
B. diffusion