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Queen I Agamegwa

Human physiology lab

what is homeostasis? The body ability to maintain a stable inter environment despite external changes.
What is the four major tissue type? Epithelial, connective, muscle, and nervous tissue.
What is the smallest unit of life? The cell.
What are the three phases of an action potential? Depolarization, Repolarization, and hyperpolarization.
During depolarization which ion enters the neuron? Sodium (Na+) ions enter through voltage-gated channels.
What is the all-or-none principle? Once threshold is reached, an action potential occurs completely or not at all.
What is the main function of the mitochondria? To produce ATP, the cell's main energy source.
what is the difference between graded and action potentials? Graded potentials vary in strength; action potentials are all-or-none and self-propagating.
What part of the brain controls balance and coordination? The cerebellum.
What structure separates the thoracic and abdominal cavities? The diaphragm.
What neurotransmitter is released at the neuromuscular junction? Acetylcholine (ACh).
What are the three types of muscles tissues? Skeletal, cardiac, and smooth muscle.
What is the function of the sarcoplasmic reticulum? It stares and release calcium tropomyosin to move and expose binding site on actin
What part of the brain regulates breathing and heart rate? The medulla oblongata
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