ATI TEAS 7 SCIENCE Study Guide 2026 - 2027

Test-Taking Strategies & Tips

  • Importance of organized study techniques for high-stake tests such as TEAS (Test of Essential Academic Skills).

  • Emphasizes a positive mindset: "You’ve SO got this!"

Introduction by Nurse Cheung

  • Author: Jennifer Cheung, MSN, RN, CCRN.

  • Acknowledges the emotional challenges students face during intense study periods.

  • Encourages students to connect with supportive peers for motivation.

Copyright and Disclaimer

  • Copyright Information: All content rights reserved to Nurse Cheung LLC.

  • Usage Limitations: Material cannot be reproduced in any form without permission for commercial purposes.

  • Disclaimer: Information is accurate at time of publication, but guidelines and standards may change; always check with current ATI TEAS resources.

Table of Contents Overview

  • Systems Covered: Includes anatomical positions, anatomical terms, and multiple human body systems.

  • Focus Areas: Anatomy, physiology, life and physical science principles, important chemical concepts, and study resources.

Anatomical Terminology

  • Definition: Standardized language in science and medicine for clear communication about the body.

  • Key Terms:
      - Cephalic: Pertaining to the head.
      - Cranial: Pertaining to the skull.
      - Cervical: Pertaining to the neck.
      - Brachial: Pertaining to the arm.
      - Patella: Front of the knee.
      - Dorsum: Top of the foot.

Anatomical Position & Directions

  • Anatomical Position: Standard position of the body used to describe locations.

  • Major Terms:
      - Anterior (front)
      - Posterior (back)
      - Superior (above)
      - Inferior (below)
      - Proximal (closer to attachment)
      - Distal (farther from attachment)

Respiratory System Overview

  • Major Structures:
      - Upper respiratory tract: Nose, nasal cavity, pharynx, larynx, and trachea.
      - Lower respiratory tract: Bronchi, bronchioles, and alveoli.

  • Functions:
      - Ventilation: Movement of air in and out of the lungs.
      - Gas Exchange: O₂ in, CO₂ out (via alveoli).

Detailed Functions of the Respiratory System

  • Gas Exchange Mechanism:
      - Oxygen enters the blood, and carbon dioxide exits via diffusion.
      - Diffusion process: Movement occurs from high concentration areas to low.

Breathing Mechanics

  • Inhalation and Exhalation:
      - Inhalation: Diaphragm contracts, increasing thoracic cavity volume and decreasing pressure.
      - Exhalation: Diaphragm relaxed, pressure increases, and air flows out.

Cardiovascular System Overview

  • Major Components: Heart, blood vessels (arteries, veins).

  • Heart Chambers: Right atrium, left atrium, right ventricle, left ventricle.

  • Functions:
      - Transport of oxygen, nutrients, and waste;
      - Regulation of body temperature and pH levels.

Blood Flow Pathway

  1. Deoxygenated blood enters heart through Superior and Inferior vena cavae.

  2. Right atrium → Tricuspid valve → Right ventricle → Pulmonary artery → Lungs.

  3. Oxygenated blood returns via Pulmonary veins → Left atrium → Mitral valve → Left ventricle → Aorta.

Genetic principles: Mendel’s Law of Inheritance

  • Dominant Traits: Expressed even with a recessive counterpart.

  • Punnett Squares: A tool to predict offspring genotypes from parental genotypes.

  • Homozygous vs. Heterozygous:
      - Homozygous (BB or bb): same alleles.
      - Heterozygous (Bb): different alleles.

Cellular Processes: Mitosis vs. Meiosis

  • Mitosis: Results in two identical daughter cells — critical for growth and repair.

  • Meiosis: Produces four non-identical gametes — key in sexual reproduction and genetic diversity.

Overview of Cell Structure

  • Key Organelles and Functions:
      - Nucleus: DNA housed, control center of the cell.
      - Mitochondria: ATP production site (energy).
      - Ribosomes: Protein synthesis; can be free in cytosol or bound to the ER.

  • Differences in Plant and Animal Cells: Cell wall, chloroplasts, and vacuole presence in plant cells vs. absence in animal.

Chemistry Concepts: Balancing Chemical Reactions

  • Principle: Conservation of mass ensures equal number of atoms on both sides of a reaction.

  • Reactions Types: Synthesis, decomposition, single displacement, double displacement.

Properties of Solutions

  • Solvents and Solutes: Solvent dissolves solute to form a solution.

  • Solubility Factors: Temperature, pressure, and nature of solutes affect solubility.

Urinary System Functions

  • Main Function: Excretion of waste, regulation of blood pressure, electrolytes, and acid-base balance.

  • Nephrons: Functional units of the kidneys involved in filtration and urine formation.

Conclusion

  • This extensive outline serves as a foundation for preparation and review in TEAS examination, covering essential aspects of biological and physical sciences, anatomy, and physiological systems.

Suggestions for Effective Study

  • Engage in group discussions and study sessions.

  • Utilize practice tests to familiarize yourself with the examination format.

  • Regularly revisit difficult topics to reinforce understanding.