Biology Regents Review: Structure & Function

Front

What is diffusion?

Back

Diffusion is the process by which particles move from areas of high concentration to areas of low concentration.

Front

What type of feedback loop is represented by blood sugar regulation?

Back

Negative feedback loop: blood sugar increases → pancreas releases insulin → blood sugar decreases.

Front

What is the smallest unit of life?

Back

The smallest unit of life is the cell.

Front

How do muscle cells and nerve cells have the same DNA but different functions?

Back

The proteins expressed in each cell are different, leading to different functions despite having the same DNA.

Front

What is a positive feedback loop?

Back

A positive feedback loop amplifies a response or process, leading to an increase in the output.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are catalysts that speed up chemical reactions in the body by lowering the activation energy.

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.