BIO 181 – Exam 3 – Arizona State University – 2026 Practice Questions and Answers

BIO 181 ASU Exam 3 2026 With
Questions And Answers


T or F: Potassium ions are at high concentrations inside of cells, including neurons
- correct answer-True




The action potential is a result of: - correct answer-the movement of ions




The post-synaptic cell can be: - correct answer-in glands, muscle cells and neurons




Th resting potential of a neuron is - correct answer--60mV




T or F: The cell body refers to the part of the neurons that begin at the dendrites
and extend to the axon terminal - correct answer-false




T or F: Voltage gated ion channels open when a protein binds to the receptor -
correct answer-false



T or F: Excitatory synapses cause hyperpolarization of post-synaptic cells - correct
answer-false

, T or F: Acetylcholinesterase breaks acetylcholine into muscarinic acid - correct
answer-false




In the motor end plate, the event that is the immediate trigger for exocytosis is -
correct answer-calcium ions




T or F: Fast Neurons as described in lecture require cytoplasmic signal
transduction to open an ion channel. - correct answer-False




T or F: Only pre-synaptic neurons are coated with myelin. - correct answer- False




T or F: When the presynaptic cell contacts a muscle cell, the synapse area is called
a motor end plate. - correct answer-True




T or F: Receptors are made from membrane-bound polyribosomes. - correct
answer-True



The terminal web: - correct answer-is a site of exocytosis




T or F: Excitatory synapses cause depolarization of the post-synaptic cell - correct
answer-True