ASU BIO 181 EXAM 3 (13-16) ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

ASU BIO 181 EXAM 3 (13-16) ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Receptors are made from membrane-bound polyribosomes. - Answer - True In the motor end plate, the event that is the immediate trigger for exocytosis is: - Answer -Calcium ions Draw a neuron, and label all the parts as described in lecture. - Answer - The cell body refers to the part of the neurons that begin at the dendrites and extend to the axon terminal. - Answer -False Acetylcholine esterase breaks acetylcholine into muscarinic acid - Answer -False List the 4 types of glial cells and list a phrase to describe their function. - Answer -1. Schwann Cells: Provides electrical insulation by wrapping around the axon. 2. Oligodendrocytes: Same function for axons in CNS. 3. Astrocytes: Contribute to blood-brain barrier. 4: Microglia: Protects brain. The action potential is: - Answer -A result of the movement of ions The post-synaptic cell can be: - Answer -In glands, muscle cells, neurons Only pre-synaptic neurons are coated with myelin. - Answer -FalseThe autonomic nervous system contains the sympathetic and the parasympathetic nervous system. - Answer -True The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs. - Answer -True The neural tissues are - Answer -Spinal cord, sensory neurons, and brain Draw an action potential in the axon of a neuron and indicate which ions flow into the neuron and out of the neuron as the action potential passes at the point where the electrodes are in the cell. Be sure to assign on the Y-axis the mV of each of these areas. This should be as described in my lectures. - Answer - Briefly explain why the action potential flows only from the axon hillock to the terminal web - Answer -During the flow of the action potential there is a refractory period that ensures the action potential can't go backwards. This happens via the sodium channels. They only allow positive movement, which allows the action potential to keep flowing forward. The terminal web: - Answer -is a site of exocytosis The axon from a pre-synaptic cell contacts the axon of another neuron. - Answer -False The resting potential of neurons is: - Answer -The answer is not on this list Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion channel. - Answer -False