Exploring the Nervous System: Functions and Organization

What does the nervous system control?

• None of the above

• Only psychological reactions

• Both physiological and psychological reactions

• Only physiological reactions

What are the two main parts of the nervous system?

• The autonomic and somatic systems

• The brain and the heart

• The sensory and motor systems

• The central and peripheral nervous systems

What is the primary role of the peripheral nervous system?

• To process information

• To control voluntary movements

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

• To produce myelin sheath

Which division of the nervous system calms the body after action?

• Somatic nervous system

• Sympathetic division

• Parasympathetic division

• Motor division

What role do glial cells play in the nervous system?

• They are not part of the nervous system

• They serve many important functions including support and protection

• They transmit signals

• They only provide structural support

What is the function of the myelin sheath?

• To detect sensory stimuli

• To transmit signals

• To protect and insulate axons

• To provide nutrients to neurons

What distinguishes neurons from other cells in the body?

• They are the only cells that contain DNA

• They have a shorter lifespan

• They can divide indefinitely

• They have a high metabolic rate and are irreplaceable

Tags

NGSS.MS-LS1-8

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

• Bipolar neurons

• Unipolar neurons

• Multipolar neurons

• None of the above

What is the main function of sensory neurons?

• Transmit impulses to muscles

• Transmit impulses from the CNS to the rest of the body

• Connect sensory and motor neurons

• Pick up messages from sensory receptors and send them to the CNS

How do neurons communicate with each other?

• Through glial cells

• By releasing hormones

• Using chemical and electrical signals

• Through physical contact

Tags

NGSS.MS-LS1-3