Life Science Organ Systems Gas Exchange

Pre-Test

Most animals need oxygen to survive. Why is oxygen necessary for them?

a. Because it is a necessary precursor for photosynthesis

b. Because it can be turned into carbon dioxide which is essential for animal life

c. Because animals are made up of cells, and oxygen is needed for animal cells to create energy

d. Because it can be broken down into usable nutrients like carbohydrates

What is/are the main function(s) of the circulatory system?

a. To transport nutrients and oxygen to cells, remove carbon dioxide and other waste products from the cells, and allow for efficient gas exchange

b. To bring oxygen to the bloodstream and remove carbon dioxide from the blood

c. To protect the body from damage and water loss

d. To facilitate communication between body systems via electrical impulses

The heart falls into what level of organization?

a. Organ system

c. Tissue

b. Organ

d. Cell

During and after exercising, a person’s heart and respiratory rate are usually elevated. What is a possible explanation for why the body responds like this?

a. The body is overheating, and the heart needs to pump more blood to the skin to release heat

c. Exercising causes damage to the tissues, and the circulatory system needs to help immune cells get to the area of damage faster

b. Once the person is relaxed, the body needs to rest and needs more carbon dioxide

d. During exercise, the body’s cells use up more oxygen, so the body has to compensate by bringing in and transporting more oxygen at a faster rate

Smoking cigarettes increases the likelihood of developing lung cancer by 15-30 fold. What is the most basic level of organization affected by lung cancer?

a. Cells and tissue

c. Organ system and organism

b. Organ and organ system

d. Cells and organism