The oxygen and carbon dioxide crosses the plasma membrane through the process of _.
Correct answer: C. Passive diffusion
- A. Active diffusion
- B. Facilitated diffusion
- C. Passive diffusion
- D. Random diffusion
Explanation
Passive diffusion is the type of diffusion which takes place down the concentration gradient and there's no need of any Channel protein. Since the concentration of Oxygen entering the alveoli is greater whereas the concentration of oxygen entering the lungs through blood is lower, thus a concentration gradient created and oxygen diffuse from alveoli into the blood through the plasma membrane. Vice versa happens for Carbondioxide. Since, Oxygen and Carbondioxide are small, soluble polar molecules, they can easily cross the plasma membrane via Passive transport, marking this option to be correct.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Cell Structure and Function
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cell Structure and Function questions
Secretion of insulin from beta cells of pancreas is an example of which membrane function?
The outer and inner membranes of a mitochondria spindle are _.
Which of the following about the nucleolus is not true?
What would be the resolving power of the objective lens in a microscope if the eyepiece is 10X and the total magnification is 40X?
Which cell organelle is involved in apoptosis?
This jelly like substance inside the plasma membrane in which all cell organelles are floating is?