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单词 postganglionic
例句 postganglionic
The postganglionic neuron, in turn, acts on a target organ. Biology for AP Courses 2022-06-09T00:00:00Z
The same molecule, such as norepinephrine, could be considered either a neurotransmitter or a hormone on the basis of whether it is released from a postganglionic sympathetic axon or from the adrenal gland. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic fibers from the ganglia activated by the vagus nerve are often incorporated into the structure of the organ, such as the mesenteric plexus of the digestive tract organs and the intramural ganglia. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic parasympathetic fibers also release ACh, but the receptors on their targets are muscarinic receptors, which are G protein–coupled receptors and do not exclusively cause depolarization of the postsynaptic membrane. Anatomy and Physiology 2013-06-19T00:00:00Z
Some sources will refer to the connection between a postganglionic fiber and a target effector as neuroeffector junctions; neurotransmitters, as defined above, would be called neuromodulators. Anatomy and Physiology 2013-06-19T00:00:00Z
The axons of the preganglionic neurons release acetylcholine on the postganglionic neurons, which are generally located very near the target organs. Biology for AP Courses 2022-06-09T00:00:00Z
For most organ systems in the body, the competing input from the two postganglionic fibers will essentially cancel each other out. Anatomy and Physiology 2013-06-19T00:00:00Z
The short reflex involves the direct stimulation of a postganglionic fiber by the sensory neuron, whereas the long reflex involves integration in the spinal cord or brain. Anatomy and Physiology 2013-06-19T00:00:00Z
Acetylcholine released by these postganglionic parasympathetic fibers cause the vessels to dilate, leading to the engorgement of the erectile tissue. Anatomy and Physiology 2013-06-19T00:00:00Z
These drugs either bind to particular adrenergic receptors and mimic norepinephrine at the synapses between sympathetic postganglionic fibers and their targets, or they increase the production and release of norepinephrine from postganglionic fibers. Anatomy and Physiology 2013-06-19T00:00:00Z
A postganglionic fiber—the axon from a ganglionic neuron that projects to the target effector—represents the output of a ganglion that directly influences the organ. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic fiber projects from the terminal ganglia a short distance to the target effector, or to the specific target tissue within the organ. Anatomy and Physiology 2013-06-19T00:00:00Z
Compared with the preganglionic fibers, postganglionic sympathetic fibers are long because of the relatively greater distance from the ganglion to the target effector. Anatomy and Physiology 2013-06-19T00:00:00Z
The problem with that usage is that the cell body is in the ganglion, and only the fiber is postganglionic. Anatomy and Physiology 2013-06-19T00:00:00Z
That neuron, connected to the smooth muscle, is a postganglionic parasympathetic neuron that can be controlled by a fiber found in the vagus nerve. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic sympathetic fibers that contact the blood vessels within skeletal muscle and that contact sweat glands do not release norepinephrine, they release ACh. Anatomy and Physiology 2013-06-19T00:00:00Z
Comparing the relative lengths of axons in the parasympathetic system, the preganglionic fibers are long and the postganglionic fibers are short because the ganglia are close to—and sometimes within—the target effectors. Anatomy and Physiology 2013-06-19T00:00:00Z
For example, regions of the heart that establish heart rate are contacted by postganglionic fibers from both systems. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic fiber then projects to the iris, where it releases ACh onto the circular fibers of the iris—another smooth muscle. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic fibers of either division release neurotransmitters onto the smooth muscles of the iris to cause changes in the pupillary size. Anatomy and Physiology 2013-06-19T00:00:00Z
These tissues have adrenergic receptors that respond to the release of norepinephrine from postganglionic sympathetic fibers by constricting and increasing blood pressure. Anatomy and Physiology 2013-06-19T00:00:00Z
The postganglionic parasympathetic fibers then project to the smooth muscle of the iris to control pupillary size. Anatomy and Physiology 2013-06-19T00:00:00Z
For example, with diabetes, peripheral nerve damage can occur, which would affect the postganglionic sympathetic fibers. Anatomy and Physiology 2013-06-19T00:00:00Z
Also, cardiac muscle tissue is only modulated by autonomic inputs, so the conflicting information from both sympathetic and parasympathetic postganglionic fibers will cause arrhythmias. Anatomy and Physiology 2013-06-19T00:00:00Z
Drugs that act on the parasympathetic system also work by either enhancing the postganglionic signal or blocking it. Anatomy and Physiology 2013-06-19T00:00:00Z
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更新时间:2025/3/13 11:19:25