Why life depends on it
Before you read
Test yourself first: 5 questions
Question 1 of 5
Vitamins such as vitamin C and the B vitamins, which dissolve in water, are called:
Answer: B. Water-soluble vitamins dissolve in water and are not stored long-term by the body.
Question 2 of 5
The diffusion of water across a semipermeable membrane is called:
Answer: A. Osmosis is the passive movement of WATER from low to high solute concentration. Active transport moves solutes against a gradient and requires ATP.
Question 3 of 5
Which part of a plant carries water from the roots up to the leaves?
Answer: B. The stem supports the plant and transports water and nutrients between roots and leaves.
Question 4 of 5
Water makes up roughly what percent of the adult human body?
Answer: B. Water accounts for roughly 60% of the adult human body.
Question 5 of 5
A cell placed in a HYPERtonic solution will:
Answer: A. Water follows solute. Hypertonic outside → water exits → the cell shrinks. Hypotonic outside → water enters → it swells and may burst.
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