Exploring the Nervous System and Neurons

The video tutorial explains the nervous system's functions, including receiving sensory input, integrating information, and initiating motor responses to maintain homeostasis. It describes the central and peripheral nervous systems and their subdivisions. The structure of neurons is detailed, covering parts like dendrites, axons, and the myelin sheath. Neurons are classified by structure (bipolar, unipolar, multipolar) and function (motor, sensory, interneuron), highlighting their roles in transmitting action potentials.

How many main functions does the nervous system have?

• Three

• Four

• Five

• Six

Tags

NGSS.HS-LS1-3

What is the role of the central nervous system?

• To receive and interpret sensory information

• To transmit action potentials to muscles

• To insulate neuronal axons

• To connect the CNS to limbs and organs

What is the primary role of the peripheral nervous system?

• Generating motor responses

• Maintaining homeostasis

• Connecting the CNS to limbs and organs

• Interpreting sensory information

Which division of the nervous system is responsible for the 'fight or flight' response?

• Central nervous system

• Somatic nervous system

• Sympathetic division

• Parasympathetic division

Which part of the neuron generates the action potential?

• Axon Terminal

• Cell Body

• Axon Hillock

• Dendrite

What does the myelin sheath do?

• Insulates the axon

• Receives sensory information

• Transmits action potentials

• Integrates sensory information

What is a bipolar neuron characterized by?

• Multiple extensions from the cell body

• Two extensions from the cell body

• A single extension from the cell body

• No extensions from the cell body

What distinguishes a multipolar neuron?

• It has two extensions from the cell body

• It has multiple extensions from the cell body

• It has a single extension from the cell body

• It has no extensions from the cell body

What is the main function of motor neurons?

• Integrating sensory information

• Transmitting action potentials from the CNS to muscles

• Receiving stimuli from the external environment

• Transmitting sensory information to the CNS

What is the function of sensory neurons?

• To maintain homeostasis

• To create motor responses

• To transmit action potentials to the CNS

• To integrate sensory information