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Pearson Human Anatomy and Physiology Chapters 1-3 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What level of organization comes directly after tissue level?✔✔ Organ level
Which organ system is responsible for transporting nutrients, oxygen, and hormones?✔✔ Cardiovascular system
What is homeostasis?✔✔ The maintenance of a stable internal environment
Which two systems primarily control homeostasis?✔✔ Nervous system and endocrine system
What is the basic unit of life?✔✔ The cell 1 / 4
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Which term refers to the front of the body?✔✔ Anterior
Which body cavity contains the brain?✔✔ Cranial cavity
Which plane divides the body into left and right sections?✔✔ Sagittal plane
Which directional term means "toward the midline"?✔✔ Medial
What is metabolism?✔✔ All chemical reactions occurring in the body
What type of feedback mechanism enhances the original stimulus?✔✔ Positive feedback 2 / 4
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What type of feedback mechanism opposes the original stimulus?✔✔ Negative feedback
Which element is the most abundant in the human body by weight?✔✔ Oxygen
What is the smallest unit of an element that retains its properties?✔✔ Atom
Which subatomic particle has a positive charge?✔✔ Proton
Which subatomic particle is found in the nucleus but has no charge?✔✔ Neutron
Which subatomic particle is involved in chemical bonding?✔✔ Electron 3 / 4
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What is an ion?✔✔ An atom that has gained or lost electrons
What is the pH of a neutral solution?
✔✔ 7
What is the term for a substance that releases hydrogen ions in solution?✔✔ Acid
What is the term for a substance that removes hydrogen ions from solution?✔✔ Base
Which macromolecule provides the most immediate source of energy?✔✔ Carbohydrates
Which type of lipid is found in cell membranes?✔✔ Phospholipids
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