Arkansas Esthetician Practice Exam

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What do motor nerves do?

  1. Transmit sensory information to the brain

  2. Encapsulate and protect neurons

  3. Carry messages from the brain to muscles causing them to react

  4. Regulate the heart rate

The correct answer is: Carry messages from the brain to muscles causing them to react

Motor nerves are responsible for carrying messages from the brain to the muscles, causing them to react. This includes voluntary movements such as walking and talking, as well as involuntary movements such as breathing and digestion. Option A is incorrect because sensory nerves are responsible for transmitting information from sensory organs to the brain. Option B is incorrect because encapsulating and protecting neurons is the role of glial cells, not motor nerves. Option D is incorrect because regulating the heart rate is the job of the autonomic nervous system, not specifically motor nerves.

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