Unit 2 Marathon Runner Review

Front

What is active transport?

Back

Active transport is the movement of materials across a cell membrane against the concentration gradient, requiring energy in the form of ATP.

Front

What are alveoli and their function?

Back

Alveoli are tiny structures in the lungs that facilitate the exchange of oxygen and carbon dioxide through simple diffusion.

Front

What part of a phospholipid is hydrophobic?

Back

The fatty acid tails of a phospholipid are hydrophobic.

Front

What is glycogen?

Back

Glycogen is a stored form of glucose in the liver, used when there is excess glucose.

Front

What is homeostasis?

Back

Homeostasis is the maintenance of a relatively stable internal environment through negative feedback mechanisms.

Front

What is the role of ATP in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is the function of the bronchi?

Back

The bronchi are air passages that allow movement of air into and out of the lungs.

Front

What is the difference between positive and negative feedback?

Back

Negative feedback works to maintain stability by counteracting changes, while positive feedback amplifies changes.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) fatty acid tails.