Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam

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Which body system is responsible for communication in the body through electrical impulses and chemical substances?

Digestive system
Muscular system
Nervous system
Respiratory system

The correct answer is: Nervous system

The nervous system is responsible for communication in the body through electrical impulses and chemical substances. This system comprises a complex network of neurons, which are specialized cells that transmit signals throughout the body. Neurons communicate with each other and with other types of cells via electrical impulses known as action potentials and the release of neurotransmitters, which are chemical substances that bridge the gap between neurons at synapses. This intricate communication system is essential for coordinating bodily functions, responding to stimuli, and maintaining homeostasis. In contrast, while the digestive system processes food and absorbs nutrients, it does not primarily function in signaling or communication. The muscular system allows for movement but relies on signals from the nervous system to function effectively. The respiratory system is involved in gas exchange but does not play a direct role in communication through electrical impulses or chemicals, focusing instead on the exchange of oxygen and carbon dioxide.