ATI TEAS 7 SCIENCE EXAM | 50+ PRACTICE TEST QUESTIONS AND ANSWERS|GRADED A+|2025

1. Which blood group is a universal donor?

a. A
b. B
c. AB
d. O: d. O
2. Blood oxygen levels are most likely low when blood

a. leaves the aorta
b. fills the right atrium
c. reaches body tissues
d. flows through ateries: b. fills the right atrium with
3. An intracellular chemical signal can be produced in the cell membrane.
Once it is produced, where does it go?

a. To a different cell
b. To another part of the cell
c. To a region right outside the cell
d. To an area with high ion concentration: b. To another part of the cell
4. After food has been masticated in the oral cavity, where does it go next?

a. Colon
b. Liver
c. Pancreas
d. Pharynx: d. Pharynx
5. The diffusion of nutrients through the walls of the digestive system is
critical to homeostasis in the body. Where does the majority of this diffusion
take place in the digestive system?

a. Stomach
b. Esophagus
c. Oral cavity
d. Small intestine: d. Small intestine
1 B/ B12

, 6. As soon as an invader, known as a(n) , enters the body, the
body begins to fight.

a. antibody
b. pathogen




2 B/ B12