Nervous System Intro.

What are the three principal functions of the nervous system?

• Sensory input, Integration, and Motor output

• Memory, Learning, and Emotions

• Digestion, Respiration, and Circulation

• Vision, Hearing, and Smell

What are the two main parts of the nervous system?

• Sympathetic and Parasympathetic Nervous Systems

• Somatic and Autonomic Nervous Systems

• Central and Peripheral Nervous Systems

• Cerebrum and Cerebellum

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

• Astrocytes

• Oligodendrocytes

• Microglial cells

• Ependymal cells

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

• Create, secrete, and circulate cerebrospinal fluid

• Surround and support neuron cell bodies

• Produce an insulating barrier called the myelin sheath

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

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

• Bipolar Neurons

• Interneurons or Association Neurons

• Motor or Efferent Neurons

• Sensory or Afferent Neurons

What is the main function of motor or efferent neurons?

• 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

• Transmit impulses between sensory and motor neurons

• Anchor neurons to their blood supply and govern the exchange of materials between neurons and capillaries

What is the main function of interneurons or association neurons?

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

• Transmit impulses between sensory and motor neurons

• Surround and support neuron cell bodies

• 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?

• Create, secrete, and circulate cerebrospinal fluid

• Anchor neurons to their blood supply and govern the exchange of materials between neurons and capillaries

• 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

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

• Create, secrete, and circulate cerebrospinal fluid

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

• Surround and support neuron cell bodies

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

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

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

• Anchor neurons to their blood supply and govern the exchange of materials between neurons and capillaries

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

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