Bio 5 Lecture Exam 2 Chapter 7 correctly answered 2023

Bio 5 Lecture Exam 2 Chapter 7Which neurological disease is due to a lack of myelin? - correct answer multiple sclerosis What processes causes the release of neurotransmitters? - correct answer exocytosis A drug destroys acetylcholinesterase. What do you expect would happen? - correct answer Muscles cannot relax Which portion of a neuron releases neurotransmitters? - correct answer Axon ending What is the purpose of myelin? - correct answer increase velocity of neural impulse conduction Some muscle relaxants work by blocking calcium channels. This prevents them from opening. Predict which process will be prevented first. - correct answer exocytosis of acetylcholine Which neuron is associated with the bracket? - correct answer interneuron Please pick the correct order of events for synaptic transmission. Note neurotransmitter = NT. - correct answer neural impulse, calcium channels open, exocytosis of NT vesicles, diffusion of NT, binding of NT to postsynaptic membrane Which is not a function of glial cells? - correct answer control effector organs What is the function of association neurons? - correct answer receive sensory input and control motor output How does the body distinguish a weak touch from a strong touch? A weak touch _____ than a strong touch. - correct answer produces fewer action potentials Pick the true statement concerning the all-or-nothing aspect of nerve cell conduction. - correct answer All action potentials have the same intensity. What does an inhibitory synapse do? - correct answer decreases the likelihood of forming an action potential Pick the incorrect association. - correct answer motor neuron: connects to sensory receptor What happens when threshold is reached? - correct answer Sodium gates open. Repolarization is due to __________. - correct answer potassium ions exiting the neuron What causes sodium to enter the cell once threshold is reached? - correct answer the sodium ion concentration gradient Please put in the correct order for the formation of an action potential. - correct answer resting potential, threshold, depolarization, peak, repolarization What is a mixed nerve composed of? - correct answer a sensory neuron and a motor neuron Describe the ion and charge distribution of the resting membrane potential (RMP). - correct answer Outside of the cell has more sodium ions and is more positive. Inside of the cell has more potassium ions and is more negative. Directly after repolarization what is the charge and ion distribution? - correct answer inside negative with more sodium ions and outside positive with more potassium ions A jelly-like roll structure on a neuron is observed in the electron microscope. What is being observed? - correct answer Schwann cells and an axon Which is not a part of a neuron? - correct answer glial body What happens when acetylcholine binds to the postsynaptic membrane? - correct answer