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Portage A&P Exam 1 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What term describes the maintenance of a stable internal environment?✔✔ Homeostasis
What organ system is responsible for transporting oxygen and nutrients?✔✔ Circulatory system
What cavity contains the brain?✔✔ Cranial cavity
What is the term for the study of body structure?✔✔ Anatomy
What plane divides the body into left and right halves?✔✔ Sagittal plane
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What is the name for the vertical plane that divides the body into anterior and posterior sections?✔✔ Frontal plane
What direction term means "toward the feet"?✔✔ Inferior
What direction term means "closer to the point of attachment"?✔✔ Proximal
What is the term for the body's ability to detect and respond to changes?✔✔ Responsiveness
What is the primary function of the skeletal system?✔✔ Support
What system includes skin, hair, and nails?✔✔ Integumentary system
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What organ system regulates body functions using hormones?✔✔ Endocrine system
What cavity contains the heart and lungs?✔✔ Thoracic cavity
What type of feedback reverses a change in a controlled condition?✔✔ Negative feedback
What organelle is the site of ATP production?✔✔ Mitochondrion
What structure controls what enters and exits the cell?✔✔ Cell membrane
What type of tissue lines body surfaces and cavities?✔✔ Epithelial tissue
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What body system is responsible for movement?✔✔ Muscular system
What fluid-filled cavity surrounds the lungs?✔✔ Pleural cavity
What type of energy is stored in chemical bonds?✔✔ Potential energy
What is the term for all the chemical reactions occurring in the body?✔✔ Metabolism
What is the term for a substance made of two or more elements chemically bonded?✔✔ Compound
What is the smallest unit of an element?✔✔ Atom
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