Neurons and Neural Firing

Match "A" from the diagram with the correct name.

• Soma/Cell Body

• Axon

• Axon Terminals

• Dendrites

• Myelin Sheath

Match "B" from the diagram with the correct name.

• Dendrites

• Nucleus

• Soma/Cell Body

• Nucleus

• Terminal Buttons

Match "C" from the diagram with the correct name.

• Nucleus

• Terminal Buttons

• Dendrites

• Soma/Cell Body

• Myelin Sheath

Match "D" from the diagram with the correct name.

• Nucleus

• Myelin Sheath

• Dendrites

• Terminal Buttons

• Axon

Match "E" from the diagram with the correct name.

• Terminal Buttons

• Myelin Sheath

• Axon

• Dendrites

• Soma/Cell Body

Match "F" from the diagram with the correct name.

• Soma/Cell Body

• Nucleus

• Myelin Sheath

• Terminal Buttons

• Axon

The arrow is pointing to the ​ ​ (a)   , which are chemical messengers that relay signals across the ​ (b)   between neurons.

• neurotransmitters
• synaptic gap
• hormones
• electrical impulses
• gap
• space

Match the type of neuron or pathway with its name.

• Interneurons

• carry messages from sensory receptors (like your skin) to the spinal cord.

• Motor Neurons

• simple pathway that connects the central nervous system with the peripheral nervous system

• Sensory Neurons

• carry messages from the spinal cord to the muscles, causing movement (like pulling your hand away)

• Reflex Arc

• located within the spinal cord, they process the information and send instructions to the appropriate neurons.

Put the following events in the correct order from start to finish.

• The interneurons located within your spinal cord process the information and send instructions to the appropriate neurons.

• You touch a hot stove.

• Motor neurons carry messages from the spinal cord to the muscles, causing movement.

• You pull your hand away.

• Your sensory neurons carry messages from sensory receptors (like your skin) to your spinal cord.

Put the steps for neural firing in order from start to finish.

• Depolarization – A stimulus causes sodium (Na⁺) ions to rush in, making the inside more positive.

• Action Potential – The electrical impulse travels down the axon once the threshold is reached (the all-or-none principle: the neuron fires completely or not at all).

• Refractory Period – After firing, the neuron resets; potassium (K⁺) moves out, and it cannot fire again briefly.

• Reuptake – Neurotransmitters released into the synapse are reabsorbed by the sending neuron for reuse.

• Resting Potential – The neuron is at rest, negatively charged inside and ready to fire.