UNIT IXThe nervous system: a. general principles and sensory physiology1. In a neuron with a resting membrane potential of −65mV, the distribution of which ion across theneuronal membrane represents the greatest potential electromotive force (EMF)?A) PotassiumB) ChlorideC) SodiumD) Calcium2. Forced rapid breathing results in alkalization of the blood which would lead to which of thefollowing changes in neuronal activity?A) Decrease in neuronal activityB) Increase in neuronal activityC) Initial decrease followed by an increaseD) No change in neuronal activity3. The release of neurotransmitter at a chemical synapse in the central nervous system is dependent uponwhich of the following?A) Synthesis of acetylcholinesteraseB) Hyperpolarization of the synaptic terminalC) Opening of ligand-gated ion calcium channelsD) Influx of calcium into the presynaptic terminal4. Which of the following is best described as an elongated, encapsulated receptor found in the dermalpegs of glabrous skin and is especially abundant on lips and fingertips?A) Merkel’s discB) Free nerve endingsC) Meissner’s corpuscleD) Ruffini’s endings5. Pain receptors in the skin are typically classified as which of the following?A) Encapsulated nerve endingsB) Single class of morphologically specialized receptorsC) Same type of receptor that detects position senseD) Free nerve endings6. Which of the following best describes an expanded tip tactile receptor found in the dermis of hairyskin that is specialized to detect continuously applied touch sensation?A) Free nerve endingsB) Merkel’s discC) Pacinian corpuscle
đang được dịch, vui lòng đợi..