What in the significance of keeping the heart from entering tetanus? Answer the

Question

What in the significance of keeping the heart from entering tetanus? Answer the following questions based upon the information given in the questions and your know ledge of the autonomic nervous system regarding its control over cardiac function. What branch of the autonomic nervous system does epinephrine mimic? How would the hormone epinephrine influence heart rate? How would a Beta_1 receptor blocker (propranolol) influence heart rate? How would a cholinergic agonist (pilocarpine) influence heart rate? How would a cholinergic inhibitor (atropine) influence heart rate? How would digitalis influence the contraction strength of the heart? How would a calcium channel blocker (verapamil) influence the contraction strength of the heart? Which of the above six chemicals could be used to elevate cardiac output?

Explanation / Answer

19) epinephrine belongs to the sympathetic division of the ANS

20)epinephrine acts on the beta adrenerguc receptors in the heart and this results in increase in contractility of heart, ie the heart rate increases

21) a beta blocker like propranolol blocks the beta adrenergic receptors in the heart and hence blocks the action of epinephrine. Thus the heart contractility and hence heart rate decreases.

22) pilocarpine is an Ach agonist and acts on the muscarinic receptors slowing down heart rate

23) attopine is Ach antagonist and hence blocks the muscarinic receptors increasing heart rate

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.