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Comfort Cephas

Anatomy week 7-13

TermDefinition
Neuron A nerve cell that transmits electrical and chemical signals in the body.
Action Potential A rapid electrical impulse that travels along a neuron’s axon.
Repolarization The phase when potassium ions exit the neuron, restoring negative charge.
Sympathetic Nervous System “Fight or flight” responses; increases heart rate and energy use.
Spinal Cord CNS structure that relays messages and coordinates reflexes.
Mechanoreceptors Sensory receptors responding to pressure, vibration, and touch.
Insulin Hormone that lowers blood glucose by promoting cellular uptake.
Diastole Relaxation phase when the heart fills with blood.
Hemoglobin Protein in red blood cells that carries oxygen.
Plasma Liquid portion of blood containing nutrients, hormones, and proteins.
Antigen A foreign molecule that triggers an immune response.
Innate Immunity Immediate, non-specific defense barriers (skin, inflammation)
Alveoli Tiny air sacs in the lungs where gas exchange occurs.
Diaphragm Major muscle of breathing that controls inhalation and exhalation.
Peristalsis Wave-like muscle contractions that move food along the GI tract.
Chyme Semi-liquid mixture of food and gastric juices in the stomach.
Bile Substance from the liver that emulsifies fats for digestion.
Created by: comfort cephas
 

 



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