Neurons Knowledge-Based Download PDF

Questions

1. 1.

   Which specialized structure located at the distal end of an axon stores neurotransmitters within vesicles and releases them into the synaptic cleft to communicate with target cells?

   • A) Node of Ranvier
   • B) Nissl substance
   • C) Axon hillock
   • D) Synaptic terminal
2. 2.

   Which specialized region of a neuron integrates incoming graded potentials and serves as the primary site where an action potential is initiated?

   • A) Axon terminal
   • B) Dendritic spine
   • C) Axon hillock
   • D) Node of Ranvier
3. 3.

   What is the primary physiological function of the myelin sheath that encloses the axons of many neurons?

   • A) It increases the speed at which nerve impulses propagate along the axon.
   • B) It synthesizes neurotransmitters and packages them into synaptic vesicles.
   • C) It receives incoming chemical signals from adjacent presynaptic neurons.
   • D) It initiates graded potentials in response to extracellular sensory stimuli.
4. 4.

   Which structural region of a neuron is primarily responsible for propagating electrical impulses away from the cell body toward target cells?

   • A) Dendrite
   • B) Axon
   • C) Soma
   • D) Synaptic cleft
5. 5.

   In a typical multipolar neuron, which structural component is primarily specialized to receive incoming signals from other cells and convey them toward the cell body?

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