If a molecule of carbon dioxide released into the blood in your left toe is exhaled from your nose, it must pass through all of the following EXCEPT _____

A) the pulmonary vein
B) an alveolus
C) the trachea
D) the right atrium
E) the right ventricle


Answer: A

Biology & Microbiology

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All food can eventually be traced back to the process of photosynthesis.

Answer the following statement true (T) or false (F)

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The simultaneous movement of Na+ out of a cell against its concentration gradient and protons into a cell with their concentration gradient is best described as an example of

a. symport. b. passive diffusion. c. antiport. d. facilitated diffusion. e. active transport

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Consider both Rh and A,B,O factors in blood typing. Which blood type would be the true universal

recipient? What will be an ideal response?

Biology & Microbiology

Some cancer cells produce the enzyme ________, which protects the ends of chromosomes during multiple rounds of cell division

Fill in the blank with correct word.

Biology & Microbiology