4th Period Semester Exam Flashcardizz

Front

What is the function of a valve in the circulatory system?

Back

Valves prevent the backflow of blood and ensure it flows in one direction through the heart and blood vessels.

Front

Define homeostasis.

Back

Homeostasis is the process by which living organisms maintain stable internal conditions necessary for survival, despite changes in the external environment.

Front

What is the primary function of the respiratory system?

Back

The primary function of the respiratory system is to bring oxygen into the body and remove carbon dioxide.

Front

Where does gas exchange occur in the respiratory system?

Back

Gas exchange occurs in the alveoli, which are tiny air sacs in the lungs.

Front

What is a control in an experiment?

Back

A control is the part of an experiment where all conditions are kept the same to provide a baseline for comparison.

Front

What is the role of the aorta in the circulatory system?

Back

The aorta is the largest artery in the body, responsible for carrying oxygenated blood from the heart to the rest of the body.

Front

Explain the process of osmosis.

Back

Osmosis is the movement of water molecules through a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the difference between an independent variable and a dependent variable in an experiment?

Back

The independent variable is the factor that is changed or manipulated, while the dependent variable is the factor that is measured or observed.

Front

What is the significance of the hypothesis in scientific experiments?

Back

A hypothesis is a testable prediction about the relationship between variables, guiding the direction of the experiment.

Front

Define respiration in biological terms.

Back

Respiration is the process by which living organisms convert oxygen and glucose into energy, producing carbon dioxide and water as byproducts.