Membranes, Glands, Fluids, Homeostasis,

    Master this deck with 18 terms through effective study methods.

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    What are membranes?

    Sheets of epithelial tissue with connective tissue underneath.

    What defines mucous membranes?

    Lines cavities that open to the outside.

    What is a key function of mucous membranes?

    Secretion of mucus for lubrication.

    How do serous membranes differ from mucous membranes?

    Serous membranes secrete watery fluid and reduce friction.

    What are exocrine glands?

    Glands that have ducts and secrete substances onto surfaces.

    What distinguishes endocrine glands?

    They are ductless and secrete hormones directly into the blood.

    What is pH?

    A measure of acidity or alkalinity based on H⁺ concentration.

    Why is pH important?

    It is essential for enzyme activity and cell function.

    What role do buffers play in the body?

    They maintain stable pH by binding or releasing H⁺.

    What is the bicarbonate buffer system?

    A key buffer system involving CO₂ and HCO₃⁻.

    What percentage of body weight is total body water?

    Approximately 60%.

    What is the difference between intracellular fluid and extracellular fluid?

    ICF is inside cells, while ECF is outside cells.

    What is diffusion?

    Passive movement of molecules from high to low concentration.

    What is osmosis?

    Movement of water across a semipermeable membrane.

    What is homeostasis?

    Maintenance of stable internal conditions necessary for survival.

    What are the components of control systems?

    Receptor, control center, and effector.

    What is negative feedback?

    A response that reduces the original stimulus to maintain stability.

    How does positive feedback differ from negative feedback?

    Positive feedback amplifies the original stimulus.