Bio 201 - Exam 4 Verified Exam Questions and Answers Latest update 2026/2027

Bio 201 - Exam 4 Verified Exam Questions and Answers Latest update
2026/2027

Question:
Structure of a Neuron

Answer:
-Dendrites
-Cell body (soma)
-Axon hillock
-Axon

Question:
Dendrites Receive signals.

Answer:
-Axon terminals (synaptic boutons)

Question:
Cell body (soma) Nucleus, organelles.

Answer:



Question:
Axon hillock Action potential initiation

Answer:



Question:
Axon Conducts signal

Answer:



Question:
Axon terminals (synaptic boutons)

Answer:
Neurotransmitter release

, Question:
Terms in Electrical Conduction

Answer:
-Membrane potential
-Resting membrane potential (RMP):
-Depolarization
-Hyperpolarization
-Threshold

Question:
Membrane potential potential difference across the membrane

Answer:
-Action Potential (AP):
-Refractory period

Question:
Resting membrane potential (RMP)

Answer:
A neuron at “rest” with a membrane potential of -70mV. unequal distribution of electrolytes between
the Extracellular fluid (ECF)

Question:
Depolarization

Answer:
and Intracellular fluid (ICF) A more positive charge(depolarization) leading to excitation triggering
action potential

Question:
Hyperpolarization A more negative charge (hyperpolarization) leading to inhibition

Answer:



Question:
Threshold

Answer:
point of no return (all or none). Voltage required to trigger AP (-55 mV