Which of the following will increase cardiac output? A: an increase in sympathetic impulses B: an increase in parasympathetic impulses C: a faster stream of impulses from the baroreceptors D: an increase in vasodilation

The following belong to peripheral nervous system ( ) A: Conducts impulses from receptors to the CNS B: Informs the CNS of the state of the body interior and exterior C: Sensory nerve fibers can be somatic or visceral D: Conducts impulses from CNS to effectors

Oligodendrocytes make myelin, a fatty substance that insulates nerve axons and speeds the conduction of impulses along nerve fibers.

One who desires and impulses are not his own has no character.（） A: his B: whose C: whom D: of whom

Children and, later, teenagers have to learn to put a brake on their impulses, to ______ their desires. A: tame B: inspire C: reveal D: skate

Neurons<br/>conduct nerve impulses through:() A: microtubule B: axolemma C: endoneurium D: synaptic vesicle E: perineurium

Through which of the following structure does nerve fibers conduct nerve impulses? A: Myelin sheath B: Axolemma C: Neurofilament D: Synaptic vesicle

The reason for rapid conduction of impulses along myelinated nerve fibers is that they have( ) A: long axons B: thick axons C: many synaptic vesicles in the axons D: clefts of Schmidt and Lantermann E: nodes of Ranvie

Sampling of an analog signal produces对一个模拟量采样，产生 A: a series of impulses that are proportional to the amplitude of the signal.与信号幅值成正比的一系列脉冲。 B: a series of impulses that are proportional to the frequency of the signal.与信号频率成正比的一系列脉冲。 C: digital codes that represent the analog signal amplitude.表示模拟信号幅值的数字代码。 D: digital codes that represent the time of each sample.表示每次采样时间的数字代码。

In myelinated nerve fibers nerve impulses() A: occurs along the entire axolemma B: jump from node to node C: jump from internode to internode D: occurs along the Schwan cells E: occurs along the oligodendrocytes