TEAS ExamStudy Topic
TEAS Science Foundations Study Guide
Study anatomy and physiology, cell biology, basic chemistry, and experimental reasoning through general educational science questions.
Topic Overview
Link structure to function
Understand a structure by the process it supports. Alveoli provide an exchange surface between air and blood; heart valves help maintain directional flow; the small intestine provides a large surface for nutrient absorption. Define arteries and veins by direction relative to the heart rather than assuming oxygen content is the same in every circuit.
Connect cellular processes
DNA stores hereditary information, while ribosomes assemble amino-acid chains using molecular instructions. Diffusion describes net movement down a concentration gradient when a substance can pass. Osmosis concerns water crossing a selectively permeable membrane. In normal body-cell division, chromosome copies are separated so daughter cells preserve the chromosome number.
Keep chemistry quantities separate
Atomic number counts protons. Neutrons contribute to mass number, and electron gain or loss changes charge. A physical change such as melting can preserve chemical identity, whereas a chemical reaction rearranges atoms into different substances. For ordinary reactions in a closed system, total mass includes gases as well as visible solids and liquids.
Describe feedback by its effect
Negative feedback reduces a deviation. In a simplified temperature model, increased heat loss helps bring temperature back toward its usual range, and the driving signal diminishes as the deviation shrinks. The important feature is the direction of the response relative to the original change.
Read experiments as arguments
Identify the independent variable that is deliberately changed, the dependent variable that is measured, and the conditions held comparable. Random assignment can reduce systematic group differences but does not guarantee identical subjects or a desired result. When two factors change together, consider confounding before making a causal claim.
Separate consistency from correctness
Repeated measurements can cluster closely while all being shifted by an instrument error. Precision concerns the consistency of readings; accuracy concerns closeness to the correct value. Use that distinction when evaluating data rather than assuming that repetition alone proves accuracy.
This topic provides general science education. It does not offer patient diagnosis, treatment, medication dosing, or vehicle or laboratory operating procedures.
- Defining arteries solely as oxygen-rich vessels.
- Confusing the role of DNA with the site of protein assembly.
- Mixing atomic number, mass number, and electric charge.
- Treating correlation as proof of a single cause.
- Assuming precise measurements must be accurate.
Checkpoint Quiz
Test your understanding of TEAS Science Foundations
These questions are for study practice only and are not official exam questions.
1. Which organ system uses kidneys to filter blood and help regulate water and dissolved substances?
2. Which organelle is the primary site of protein assembly from amino acids in a cell?
3. A membrane allows water to pass but not a dissolved solute. One side has a higher solute concentration. Under a simplified osmosis model, net water movement tends toward which side?
4. In a simple inheritance model, each parent has genotype Aa and each contributes one allele at random. What fraction of offspring is expected to have genotype aa?
5. A closed container holds a chemical reaction with no matter entering or leaving. Under conservation of mass, what should happen to total mass?
6. In an experiment comparing two soil treatments, why would randomly assigning similar seedlings to groups be useful?
7. Which structure is the primary site of oxygen and carbon-dioxide exchange between air and blood in the human lungs?
8. What is the main function of heart valves in normal circulation?
9. Most nutrient absorption from digested food occurs in which part of the human digestive tract?
10. In a simplified negative-feedback model, body temperature rises and sweating increases heat loss. What happens as temperature returns toward its usual range?
Frequently asked questions
How should I study anatomy terms?
Pair each structure with its principal function and a simple relationship to neighboring structures. Explain the process in your own words instead of memorizing names alone.
What is the independent variable?
It is the factor deliberately changed by the experimenter. The dependent variable is the measured outcome, while controlled conditions are kept comparable.
What is a confounding factor?
It is another factor that varies in a way that can complicate interpretation of the apparent relationship between the studied variable and the outcome.
How do accuracy and precision differ?
Accuracy concerns closeness to the correct value. Precision concerns consistency among repeated measurements. A miscalibrated instrument can produce precise but inaccurate readings.
