Intro to the Nervous System Review

What are the three principal functions of the nervous system?

• Sensory input, Integration, and Motor output

• Digestion, Respiration, and Circulation

• Vision, Hearing, and Smell

• Memory, Learning, and Emotions

What are the two main parts of the nervous system?

• Endocrine and Immune Systems

• Skeletal and Muscular Systems

• Respiratory and Circulatory Systems

• Central and Peripheral Nervous Systems

Which type of glial cells anchor neurons to their blood supply and govern the exchange of materials between neurons and capillaries?

• Astrocytes

• Microglial cells

• Oligodendrocytes

• Ependymal cells

What is the main function of microglial cells in the central nervous system?

• Act as the main source of immune defense against invading microorganisms

• Create, secrete, and circulate cerebrospinal fluid

• Surround and support neuron cell bodies

• Produce an insulating barrier called the myelin sheath

Which type of neurons pick up messages and transmit impulses from sensory receptors towards the central nervous system?

• Motor or Efferent Neurons

• Bipolar Neurons

• Interneurons or Association Neurons

• Sensory or Afferent Neurons

What is the main function of motor or efferent neurons?

• Transmit impulses between sensory and motor neurons

• Extend out from the cell body and convey information to the cell body

• Pick up messages and transmit impulses from sensory receptors towards the central nervous system

• Transmit impulses away from the central nervous system and out to the body's muscles and glands

What is the main function of interneurons or association neurons?

• Transmit impulses between sensory and motor neurons

• Extend out from the cell body and convey information to the cell body

• Pick up messages and transmit impulses from sensory receptors towards the central nervous system

• Transmit impulses away from the central nervous system and out to the body's muscles and glands

What is the main function of dendrites in a neuron?

• Transmit electrical impulses away from the cell body to other cells

• Pick up messages, news, and gossip from other cells and convey that information to the cell body

• Transmit impulses between sensory and motor neurons

• Surround and support neuron cell bodies

What is the main function of the axon in a neuron?

• Surround and support neuron cell bodies

• Transmit impulses between sensory and motor neurons

• Pick up messages, news, and gossip from other cells and convey that information to the cell body

• Transmit electrical impulses away from the cell body to other cells

What is the main function of the soma or cell body in a neuron?

• Life support of the neuron, containing the nucleus, DNA, mitochondria, ribosomes, and cytoplasm

• Pick up messages, news, and gossip from other cells and convey that information to the cell body

• Transmit electrical impulses away from the cell body to other cells

• Surround and support neuron cell bodies