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Human Physiology

Study Terms

TermDefinition
Homeostasis The process by which the body maintains a stable internal environment despite external changes.
Negative Feedback A mechanism that reverses a change in a controlled condition to maintain homeostasis.
Positive Feedback A mechanism that amplifies a change in a controlled condition.
Biomolecule A chemical compound, such as a carbohydrate, lipid, protein, or nucleic acid, essential for life.
Monosaccharide The simplest form of carbohydrate, such as glucose or fructose.
DNA Deoxyribonucleic acid, the molecule that carries genetic information.
RNA Ribonucleic acid, a nucleic acid involved in protein synthesis.
Cell Membrane A phospholipid bilayer that controls what enters and exits the cell.
Fluid Mosaic Model A model describing the cell membrane as a flexible layer with proteins embedded in it.
Ligand-gated Receptor A membrane receptor that opens to allow ions to pass when a specific molecule binds.
Voltage-gated Receptor A membrane protein that opens in response to changes in electrical potential.
Tissue A group of similar cells performing a common function.
Epithelial Tissue Tissue that covers body surfaces and lines organs and cavities.
Connective Tissue Tissue that supports, binds, or protects organs and other tissues.
Skeletal Muscle Muscle attached to bones that facilitates voluntary movement.
Actin A protein that forms thin filaments in muscle fibers, important for contraction.
Myosin A protein that forms thick filaments in muscle fibers, working with actin to contract muscles.
Synovial Joint A freely movable joint with a fluid-filled cavity between articulating bones.
Osteocyte A mature bone cell that maintains bone tissue.
Dermis The thick layer of skin beneath the epidermis that contains blood vessels, nerves, and connective tissue.
Created by: Wille
 

 



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