ASU BIO 181 Exam 3 -QUESTION AND ANSWERS SOLVED.

ASU BIO 181 Exam 3 -QUESTION AND ANSWERS SOLVED. Acetylcholine esterase breaks acetylcholine into muscarinic acid -Answer-False Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell. -Answer-True Blood moves very rapidly in the capillaries. -Answer-False Blood pressure drives red blood cells and plasma proteins out of the glomerulus. -Answer-False Blood pressure is the force that drives molecules out of the glomerulus into the Bowman's capsule. -Answer-True Briefly explain why the action potential flows only from the axon hillock to the terminal web. -Answer-The action potential originates from the axon hillock which initiates the flow of the action potential because of the presence of higher density voltage-gated ion channels. Difference Between Veins and Arteries -Answer-Veins carry blood towards the heart and have valves to prevent backflow, while arteries carry blood away from the heart and do not have valves. Draw a cross-section of an artery or arteriole and label the layers. -Answer- Draw a neuron, and label all the parts as described in lecture. -Answer- 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- Each kidney contains about one million nephrons. -Answer-True Efferent arterioles enter the Bowman's capsule and afferent arterioles leave the Bowman' s capsule. -Answer-False Excitatory synapses cause depolarization of the post-synaptic cell. -Answer-True Excitatory synapses cause hyperpolarization of post-synaptic cells. -Answer-False