The vague nerve carries parasympathetic impulses to the salivary glands. lacrima
ID: 167912 • Letter: T
Question
The vague nerve carries parasympathetic impulses to the salivary glands. lacrimal glands. smooth muscle of the eyes. thoracic and abdominal viscera. thyroid gland. Adrenergic receptors can be activated by the release of epinephrine. have two structural forms - muscarinic and nicotinic. when activated stimulate skeletal muscles to contract. can be found in both the sympathetic and parasympathetic divisions. are activated by the release of acetylcholine. When acetylcholine binds to autonomic muscarinic receptors, heart rate increases. voluntary movements occur. intestinal motility increases. intestinal motility decreases. intestinal motility stops. Beta-blockers (beta-adrenergic blocking agents) are frequently used to cause vasoconstriction. block muscarinic receptors. dilate the pupils of the eye. prevent increases in heart rate. prevent decreases in heart rate. Which of the following occurs when the para synthetic system is stimulated? increased blood pressure increased motility of the digestive tract increased metabolism increased heart rate decreased motility of the digestive tractExplanation / Answer
21. The vagus nerve carries parasympathetic impulses to the -D) Thoracic and abdominal viscera. This nerve plays important role in parasympathetic control of heart, lung and digestion.
22. Adrenergic receptors - A) can be activated by the release of epinephrine. Epinephrine is also known as adrenaline. The term 'adrenergic' is based on this fact.
23. When acetylcholine binds to autonomic muscarine receptors- C) intestinal motility increases. Acetylcholine binding causes contraction of intestinal smooth muscles resulting in increased motility.
24. Beta- blockers- D) prevent increase in heart rate. They block down adrenaline and noradrenaline resulting in slowing of heart rate.
25.Which one of the following occurs when parasympathetic system is stimulated?- B) increased motility of digestive tract. Parasympathetic nervous system enhances peristalsis along with greater gastric acid production, saliva secretion etc. which in turn result in better digestion.
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