Human Body Systems
完成条件
按索引浏览词汇表
特殊 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 全部
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Negative feedbackA feedback mechanism that reverses a change and returns conditions toward normal. | |
Nerve impulseAn electrical signal that travels along a neuron. | |
Nervous systemThe organ system that controls and coordinates body activities using electrical signals. | |
Nervous tissueTissue that transmits electrical signals throughout the body. | |
NeuronA specialised nerve cell that transmits electrical signals. | |
NeurotransmitterA chemical messenger released at a synapse that transmits signals to another cell. | |
Non-Infectious DiseaseA disease that is not caused by pathogens and cannot spread from person to person. | |
NutrientA substance in food that supports growth, repair, energy production, and body functions. | |
NutritionThe process of obtaining and using nutrients from food. | |