PLTW Principles of Biomedical Science - Midterm Review

Front

What system provides a framework for the body?

Back

Skeletal system: It supports the body, protects internal organs, and allows for movement.

Front

If there is 22% Cytosine, how much of all the other bases are there?

Back

22% C, 22% G, 28% A, and 28% T: In DNA, the amount of Cytosine equals the amount of Guanine, and the amount of Adenine equals the amount of Thymine.

Front

What does gel electrophoresis separate DNA fragments by?

Back

Size/weight: Gel electrophoresis uses an electric field to separate DNA fragments based on their size.

Front

What is the primary function of the digestive system?

Back

Breaks down food so we can be healthy: It processes food into nutrients that the body can use.

Front

What system transports essentials and removes wastes to and from the cells of the body?

Back

Circulatory system: It includes the heart, blood, and blood vessels to circulate nutrients and waste.

Front

What is the role of the muscular system?

Back

It enables movement of the body and maintains posture through muscle contractions.

Front

What is homeostasis?

Back

Homeostasis: The process by which the body maintains a stable internal environment despite external changes.

Front

What is the function of the respiratory system?

Back

It facilitates gas exchange, bringing oxygen into the body and removing carbon dioxide.

Front

What are the four main types of tissues in the human body?

Back

Epithelial, connective, muscle, and nervous tissues: Each type has specific functions and characteristics.

Front

What is the role of enzymes in the body?

Back

Enzymes: Biological catalysts that speed up chemical reactions in the body.