Nervous System Divisions, Sensory and Motor Neurons Functions

What is the main purpose of dividing the nervous system into parts?

• o learn about individual organs

• To understand how the entire system works together.

• To confuse students.

• o simplify the study of anatomy.

What is the role of sensory receptors?

• o provide food to the brain

• To process information

• To detect environmental changes

• To send information from the brain

Which of the following best describes the difference and primary function of sensory and motor neurons?

• Sensory neurons carry information from the central nervous system (CNS) to the muscles, while motor neurons carry information from the sense organs to the CNS.

• Sensory neurons (afferent) carry impulses from receptors toward the central nervous system, while motor neurons (efferent) carry commands from the central nervous system to effectors like muscles and glands.

• Sensory neurons are responsible for voluntary movements like walking, whereas motor neurons are responsible for involuntary sensations like feeling heat or pain.

• Sensory neurons and motor neurons both carry signals away from the brain, but sensory neurons only communicate with the skin while motor neurons communicate with internal organs.

The central nervous system consists of which two components?

• Brain and lungs

• Brain and heart

• Spinal cord and nerves

• Brain and spinal cord

The peripheral nervous system includes which of the following?

• Nerves branching from the brain and spinal cord

• Only sensory receptors

• The heart and lungs

• Only the brain

Which division of the nervous system is responsible for voluntary movements?

• Sensory division

• Autonomic division

• Somatic division

• Central division

What does the autonomic division control?

• Automatic bodily functions

• Sensory input

• Conscious decisions

• Voluntary muscle movements

A student touches a hot stove, pulls their hand back quickly, and then later feels pain and realizes what happened. Which statement best explains how the nervous system divisions worked together?

• The CNS controls only digestion while the PNS controls movement

• The autonomic system is part of the CNS while the somatic is separate

• The PNS (somatic and autonomic) connects the CNS to the body and carries signals to and from it

• The parasympathetic system works separately from the autonomic system

You are walking in the woods and suddenly see what looks like a snake near your foot. Your heart rate increases, pupils widen, and muscles tense as you prepare to run. Which division is most active?

• Somatic nervous system

• Parasympathetic division

• Central nervous system

• Sympathetic division

After a stressful exam, you eat dinner and relax on the couch. Your heart rate slows, digestion increases, and your body returns to a calm state. Which division is responsible?

• Sympathetic division

• Parasympathetic division

• Somatic nervous system

• Central nervous system