TYK57: Difference between revisions
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All of the following are effects of B-agonists except: | All of the following are effects of B-agonists except: | ||
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D. Dromotropy | D. Dromotropy | ||
<div class="mw-customtoggle-TYK_Answer" style="text-align: right; color:#0000ff">Click for Answer</div> | |||
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==Answer== | ==Answer== | ||
The answer is B. Stimulation of the Beta-1 receptors leads to increased force of contraction (inotropy), increased heart rate (chronotropy), and increased speed of impulse conduction along the conduction pathways (dromotropy). Stimulation of the receptors that increase force of contraction impair the ventricular relaxation. As such, these agents may actually impair diastolic function of the heart and make the ventricle less compliant. Drugs known to ENHANCE ventricular relaxation are said to have lusitropic effects. | The answer is B. Stimulation of the Beta-1 receptors leads to increased force of contraction (inotropy), increased heart rate (chronotropy), and increased speed of impulse conduction along the conduction pathways (dromotropy). Stimulation of the receptors that increase force of contraction impair the ventricular relaxation. As such, these agents may actually impair diastolic function of the heart and make the ventricle less compliant. Drugs known to ENHANCE ventricular relaxation are said to have lusitropic effects. | ||
==Notes== | ==Notes== | ||
<references /> | <references /> | ||
==Keywords== | ==Keywords== | ||
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<p style="text-align: center;">[[TYK56|<Prev Question]] --- [[TYK58|Next Question>]]</p> | <p style="text-align: center;">[[TYK56|<Prev Question]] --- [[TYK58|Next Question>]]</p> | ||
<p style="text-align: center;">[[TYK About | About Test Your Knowledge]]</p> | <p style="text-align: center;">[[TYK About | About Test Your Knowledge]]</p> | ||
[[Category:TYK]] | |||
Latest revision as of 02:38, 25 September 2026
All of the following are effects of B-agonists except:
A. Inotropy
B. Lusitropy
C. Chronotropy
D. Dromotropy
Click for Answer
Answer
The answer is B. Stimulation of the Beta-1 receptors leads to increased force of contraction (inotropy), increased heart rate (chronotropy), and increased speed of impulse conduction along the conduction pathways (dromotropy). Stimulation of the receptors that increase force of contraction impair the ventricular relaxation. As such, these agents may actually impair diastolic function of the heart and make the ventricle less compliant. Drugs known to ENHANCE ventricular relaxation are said to have lusitropic effects.
Notes