Understanding the Nervous System

What are the two main parts of the nervous system?

• Sensory and Motor Systems

• Muscles and Bones

• Brain and Heart

• Central and Peripheral Nervous Systems

What does the central nervous system consist of?

• Arms and Legs

• Liver and Kidneys

• Brain and Spinal Cord

• Heart and Lungs

What is the role of the peripheral nervous system?

• To control voluntary movements only

• To process information

• To communicate between the central nervous system and the rest of the body

• To support the structure of the body

What are glial cells?

• Cells that only exist in the brain

• Cells that produce myelin sheath

• The main immune defense in the brain

• Cells that support and protect neurons

What is the function of the myelin sheath?

• To insulate neuron fibers

• To process information in the brain

• To produce sensory input

• To generate motor output

Which type of neuron is most abundant in the human body?

• Bipolar neurons

• Unipolar neurons

• Sensory neurons

• Multipolar neurons

What are the three principal functions of the nervous system?

• Moving, speaking, and hearing

• Thinking, feeling, and sleeping

• Sensory input, integration, and motor output

• Breathing, digestion, and circulation

What happens when sensory receptors on your skin detect something?

• They release hormones into the bloodstream

• They send a signal to the brain for processing

• They generate heat to ward off the stimulus

• They immediately cause you to move away

What is the role of motor neurons?

• To transmit impulses towards the central nervous system

• To process sensory information

• To transmit impulses away from the central nervous system to muscles

• To support the neurons structurally

What is a unique feature of neurons compared to other cells?

• They do not require oxygen

• They are irreplaceable and have a high metabolic rate

• They have a short lifespan

• They can divide indefinitely