ASU BIO 181 Exam 3 (13-16) questions with complete solutions

Receptors are made from membrane-bound polyribosomes. correct answer: True In the motor end plate, the event that is the immediate trigger for exocytosis is: correct answer: Calcium ions Draw a neuron, and label all the parts as described in lecture. correct answer: The cell body refers to the part of the neurons that begin at the dendrites and extend to the axon terminal. correct answer: False Acetylcholine esterase breaks acetylcholine into muscarinic acid correct answer: False List the 4 types of glial cells and list a phrase to describe their function. correct 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: correct answer: A result of the movement of ions The post-synaptic cell can be: correct answer: In glands, muscle cells, neurons Only pre-synaptic neurons are coated with myelin. correct answer: False The autonomic nervous system contains the sympathetic and the parasympathetic nervous system. correct answer: True The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs. correct answer: True The neural tissues are correct 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. correct answer: Briefly explain why the action potential flows only from the axon hillock to the terminal web correct 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.