Anatomy & Physiology

Anatomy & Physiology Study Guide

13.14 Chapter Thirteen Practice Exam 1. Regulation by the nervous system provides ____________________. a. Relatively slow, but long-lasting, responses to stimuli b. Swift, long-lasting responses to stimuli c. Swift, but brief, responses to stimuli d. Relatively slow, short-lived responses to stimuli 2. In the CNS, a neuron typically receives information from other neurons at its ____________________. a. Axon b. Nissl bodies c. Dendrites d. Nucleus 3. Phagocytic cells in neural tissue of the CNS are ____________________. a. Astrocytes b. Ependymal cells c. Oligodendrocytes d. Microglia 4. The neural cells responsible for the analysis of sensory inputs and coordination of motor outputs are ____________________. a. Neuroglia b. Interneurons c. Sensory neurons d. Motor neurons 5. Depolarization of a neuron plasma membrane will shift the membrane potential toward ___________. a. 0 mV b. –70 mV c. –90 mV d. All of these

6. The primary determinant of the resting membrane potential is ____________________. a. The membrane permeability to sodium b. The membrane permeability to potassium c. Intracellular negatively charged proteins d. Negatively charged chloride ions in the ECF 7. Receptors that bind acetylcholine at the postsynaptic membrane are ____________________. a. Chemically gated channels b. Voltage-gated channels c. Passive channels d. Mechanically gated channels 8. If the resting membrane potential is –70 mV and the threshold is –55 mV, a membrane potential of –60 mV will ____________________. a. Produce an action potential b. Make it easier to produce an action potential c. Make it harder to produce an action potential d. Hyperpolarize the membrane

Answer keys found on page 366.

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