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Anatomy & Physiology Core Concepts

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  • Common functions of all living things

    Growth, reproduction, metabolism, responsiveness, movement, differentiation, and maintaining homeostasis.

  • Types of anatomy & physiology

    Gross anatomy (macroscopic), microscopic anatomy (cells and tissues), systemic physiology, and cell physiology.

  • Levels of organization in the human body

    Chemical, cellular, tissue, organ, organ system, and organism levels.

  • The 11 organ systems of the human body

    Integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems.

  • Definition of homeostasis

    The maintenance of a stable internal environment despite external changes.

  • Homeostatic regulation

    Processes that detect and respond to changes to maintain homeostasis, involving receptors, control centers, and effectors.

  • Negative feedback

    A response that reverses a change to return conditions to normal (e.g., body temperature regulation).

  • Positive feedback

    A response that amplifies a change, moving conditions further from normal (e.g., blood clotting, childbirth contractions).

  • Anatomical position

    Body standing upright, facing forward, feet flat, arms at sides with palms facing forward.

  • Supine and prone positions

    Supine: lying face up; prone: lying face down.

  • Abdominopelvic quadrants and regions

    Quadrants: right upper, left upper, right lower, left lower; Regions: nine areas including epigastric, umbilical, hypogastric, etc.

  • Anatomical directions

    Terms like superior, inferior, anterior, posterior, medial, lateral, proximal, distal, superficial, and deep describe location.

  • Sectional planes of the body

    Coronal (frontal), sagittal (left/right), and transverse (horizontal) planes.

  • Body cavities of the trunk

    Dorsal cavity (cranial and vertebral) and ventral cavity (thoracic and abdominopelvic).

  • Definition of chemistry

    The study of matter, its properties, and how it changes.

  • Matter and mass

    Matter is anything that has mass and occupies space; mass is the amount of matter in an object.

  • Three major subatomic particles and their charges

    Protons (+), neutrons (neutral), electrons (-).

  • Atomic number

    The number of protons in an atom's nucleus, defining the element.

  • Isotope and radioisotope

    Isotopes have the same number of protons but different neutrons; radioisotopes are unstable isotopes that emit radiation.

  • Atomic weight

    The average mass of an element's isotopes weighted by abundance.

  • Electron shells

    Energy levels around the nucleus where electrons orbit.

  • Chemical bond, molecule, and compound

    Chemical bond: force holding atoms together; molecule: two or more atoms bonded; compound: molecule with different elements.

  • Types of ions

    Cations (positive charge) and anions (negative charge).

  • Ionic bonding

    Bond formed by transfer of electrons between atoms creating oppositely charged ions.

  • Covalent bonding

    Bond formed by sharing electrons between atoms.

  • Hydrogen bond

    Weak attraction between a hydrogen atom and an electronegative atom.

  • Surface tension

    The cohesive force at the surface of water caused by hydrogen bonding.

  • Energy types

    Kinetic energy is energy of motion; potential energy is stored energy.

  • Decomposition and synthesis reactions

    Decomposition breaks molecules down; synthesis builds molecules up. Hydrolysis adds water to break bonds; dehydration synthesis removes water to form bonds.

  • Role of enzymes

    Biological catalysts that speed up chemical reactions without being consumed.

  • Exergonic and endergonic reactions

    Exergonic release energy; endergonic require energy input.

  • Nutrients and metabolites

    Nutrients are substances needed for energy and growth; metabolites are products of metabolism.

  • Inorganic and organic compounds

    Inorganic lack carbon-hydrogen bonds; organic contain carbon-hydrogen bonds.

  • Properties of water

    High heat capacity, solvent abilities, lubrication, and chemical reactivity.

  • pH, acids, and bases

    pH measures hydrogen ion concentration; acids release H+; bases accept H+.

  • Salt, electrolytes, and buffers

    Salt dissociates into ions; electrolytes conduct electricity; buffers maintain pH balance.

  • Carbohydrates

    Organic molecules made of carbon, hydrogen, and oxygen; primary energy source.

  • Lipids and fatty acids

    Hydrophobic molecules including fats, oils, and steroids; fatty acids are building blocks.

  • Proteins

    Polymers of amino acids; perform structural, enzymatic, and regulatory functions.

  • Nucleic acids

    DNA and RNA; store and transmit genetic information.

  • ATP and its importance

    Adenosine triphosphate; primary energy carrier in cells.

  • hydrolytic


    type of decomposition reaction using water, building polypeptides is a synthesis reaction