Concept Check

Question 1

Why do sperm have tails? Which concept does this demonstrate?

Answer 1

To swim to the egg during intercourse. This concept demonstrates structure to function.

Question 2

Give an example of the importance of diffusion.

Answer 2

Oxygen is diffused into the bloodstream, which then gives energy to the body cells.

Question 3

Give an example of the importance of surface area.

Answer 3

The villi have large surface area so that the can absorb more nutrients in more places.

Question 4

What is an instance of negative feedback in the endocrine system?

Answer 4

Once a hormone is sent to a cell, and has finished its job, the hormone turns itself off.