Neurons Knowledge-Based Practice

Questions

1. 1.

   Which structural class of neurons features a single dendrite and a single axon extending from opposite poles of the cell body and is typically found in specialized sensory organs such as the retina and olfactory mucosa?

   • A) Multipolar neurons
   • B) Pseudounipolar neurons
   • C) Bipolar neurons
   • D) Anaxonic neurons
2. 2.

   Which region of a neuron contains membrane-bound synaptic vesicles and is specialized for releasing chemical neurotransmitters into the synaptic cleft?

   • A) Dendritic branch
   • B) Axon terminal
   • C) Node of Ranvier
   • D) Schwann cell nucleus
3. 3.

   In a typical multipolar neuron, which structural region integrates incoming graded potentials from the dendrites and cell body to initiate an action potential if the threshold is reached?

   • A) Dendritic spine
   • B) Node of Ranvier
   • C) Axon hillock
   • D) Synaptic terminal
4. 4.

   What is the primary physiological role of the myelin sheath that surrounds the axon of many vertebrate neurons?

   • A) To synthesize and store neurotransmitter molecules for chemical transmission
   • B) To receive incoming chemical stimuli directly from neighboring receptor cells
   • C) To generate the cellular energy required for active sodium ion transport
   • D) To electrically insulate the axon and increase the speed of nerve impulse propagation
5. 5.

   Which part of a neuron primarily receives incoming signals from neighboring cells and conducts electrical impulses toward the cell body?

   • A) Axon
   • B) Myelin sheath
   • C) Dendrite
   • D) Axon terminal

Answers and step-by-step solutions appear after you finish the test.