Download Physiology Exam 2 Practice Test and more Exams Physiology in PDF only on Docsity! PHYSIOLOGY EXAM 2 PRACTICE TEST QUESTIONS 100% CORRECTLY SOLVED ANSWERS. Neurotransmitters that are catecholamines - Correct Answer- dopamine, epinephrine, and norepinephrine What contains portions of the frontal lobe, thalamus, and hypothalamus and is associated with emotional states such as fear and happiness - Correct Answer-limbic system What is the dominant extracellular cation - Correct Answer-Na+ What is the dominant extracellular anion - Correct Answer-Cl- Which part of the brain plays a role in complex processing of incoming sensory information such as integrating information from different senses - Correct Answer-somatosensory area The resting membrane potential of a neuron is closest to - Correct Answer-the equilibrium potential of K+ Neurons that carry sensory information to the brain are called - Correct Answer-afferent neurons What part of the nervous system includes the brain and spinal cord - Correct Answer-Central Nervous System What is responsible for the "fight or flight" response - Correct Answer- sympathetic nervous system The charge difference between the inside and outside of a cell is called - Correct Answer-membrane potential What glial cell produces myelin in the central nervous system - Correct Answer-Oligodendrocytes What region of the brain acts as a relay station for sensory inputs to the cerebral cortex - Correct Answer-thalamus A group of neuronal cell bodies in the central nervous system is called - Correct Answer-nuclei If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the membrane potential - Correct Answer-the inside of the membrane will become more negative (hyperpolarization) What is true about action potentials - Correct Answer-during the repolarization phase, sodium channels close and potassium channels open, during the depolarization phase, membrane potential becomes positive, in the after-hyperpolarization phase, membrane potential approaches the potassium equilibrium potential What is not true about action potentials - Correct Answer-the rapid depolarization phase is caused by the entry of potassium ions The basic units of the nervous system (nerve cells) are called - Correct Answer-neurons What is the resting membrane potential of a typical neuron - Correct Answer--70mV White matter is - Correct Answer-myelinated The depolarization phase of an action potential is caused by - Correct Answer-opening of voltage gated Na+ channels
