Question

QUESTION 1

1. Which of the following can undergo simple diffusion through a phospholipid bilayer?

   		CO2
   		Glucose
   		H2O
   		K+

3 points   

QUESTION 2

1. If a cell has more concentration of solutes inside than outside, it is in a(n) __________ environment.

   		Hypotonic
   		Hypertonic
   		Mesotonic
   		Isotonic

3 points   

QUESTION 3

1. If a cell has less concentration of solutes inside than outside, it is in a(n) ___________ environment.

   		Hypertonic
   		Mesotonic
   		Isotonic
   		Hypotonic

3 points   

QUESTION 4

1. If a cell has equal concentration of solutes inside than outside, it is in a(n) __________ environment.

   		Isotonic
   		Mesotonic
   		Hypertonic
   		Hypotonic

Answer 1

Q-1) CO2

CO2 can undergo simple diffusion through a phospholipid bilayer. Simple diffusion means the movement of particles through the membrane with no assistance from an area of higher concentration to an area of lower concentration. Small nonpolar molecules like CO2 and Oxygen can pass through the cell membrane by simple diffusion. Besides this hydrophobic molecules like lipids can also pass through the membrane by simple diffusion.

Q-2) Hypotonic

If a cell has more concentration of solutes inside than outside, it is in a hypotonic environment.

Q-3) Hypertonic

If a cell has less concentration of solutes inside than outside, it is in a Hypertonic environment.

Q-4) Isotonic

If a cell has equal concentration of solutes inside than outside, it is in an isotonic environment.