In the neuron above, which appropriately labels the axon(s)? - correct answer B - is pointing to the singular axon structure.
In the neuron above,
... [Show More] which appropriately labels the dendrite(s)? - correct answer A - is the branched dendritic structure. Neurons can have thousands or tens of thousands of dendrites.
In the neuron above, which appropriately labels the soma? - correct answer Neither A nor B - The soma is the cell body, which includes the nucleus (schematized as the pink dot) and other organelles.
What role does the soma play in neural information transmission? - correct answer The soma plays no role in information transmission.
What type of neuron is the cell schematized above? - correct answer Multipolar - Multipolar cells have numerous dendrites.
Which cells have a single dendrite extending from one side of the cell body and a single axon extending from the other side? - correct answer Bipolar - Bipolar cells have an axon.
What is true of an anaxonic neuron? - correct answer They have no easily identifiable axon. - These star shaped neurons have no real axons.
Electrical impulses are caused by what mechanism in the neuron? - correct answer Movement of ions through voltage gated ion channels across the cell membrane. - Sodium and potassium move across the membrane through voltage gated ion channels.
What glial contribution accelerates electrical impulses in the neuron? - correct answer Myelin sheaths - Myelin sheaths produced by oligodendrocytes and Schwann cells provide nodes of Ranvier, which increases signal speed.
Which cell type transmits signals from the CNS to PNS? - correct answer Efferent neurons
Which cell type distributes sensory and motor information in the CNS? - correct answer Interneurons
Identify the correct path of a reflex arc: - correct answer Stimulus → Afferent neuron → CNS → Efferent neuron → Motor response
Which cell type produces an electrical impulse? - correct answer Afferent neurons - These and all neurons are capable of electrical impulses.
Which cell type provides myelination in the PNS? - correct answer Schwann cells
Which cell type is only found in the CNS? - correct answer Oligodendrocytes - Oligodendrocytes provide myelination in the CNS.
Which cell type is responsible for providing immune protection? - correct answer Microglia - These glia are similar to macrophages or immune cells.
Which cell type also indirectly provides immune protection? - correct answer Astrocytes - These cells coat the vasculature to form the blood-brain barrier and prevent infectious agents from entering the central nervous system (CNS).
Which cells provide structure and nutritive support in the CNS and PNS? - correct answer Astrocytes and satellite cells
What happens to neurotransmitters in the synaptic cleft? - correct answer Some bind to receptors and some are reabsorbed.
How are neural electrical impulses communicated over the synapse? - correct answer Electrical impulses are not communicated over the synapse. [Show Less]