Question

3.
read to me as people age, flexibility, bone _ and muscle strength naturally _.
worth 1.000 points.

a. density; decrease

b. length; increase

c. flexibility; suffer

4.
read to me the cardiovascular system brings nutrients to cells and carries away ___.
worth 1.000 points.

a. waste

b. water

c. enzymes

Explanation:

Question 3

To solve this, we analyze each option:

• Option A: As people age, bone density (the amount of bone mineral in bone tissue) typically decreases, and flexibility and muscle strength also naturally decrease. This matches the physiological changes with aging.
• Option B: Bone length does not increase with age, and muscle strength/flexibility don't increase with aging, so this is incorrect.
• Option C: The first blank repeating "flexibility" is illogical, and "suffer" is not the right verb to describe the change in these factors.

The cardiovascular system (heart and blood vessels) functions to transport nutrients to cells and remove waste products (like carbon dioxide, urea, etc.) from cells.

• Option A: "waste" is correct as the system carries away cellular waste.
• Option B: Water is not the primary substance carried away (though it can be part of blood, the main removal is waste).
• Option C: Enzymes are not primarily carried away by the cardiovascular system from cells; they have other roles in the body.

Answer:

A. density; decrease

Question 4