Quiz4Questions789Explanations

Quiz4Questions789Explanations - Cardiovascular System 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Cardiovascular System 1 Quiz Answers Fall 2010 Quiz 4 – Questions 7-9 Explanations of the Answers 7. Drug W markedly increases the diastolic pressure (DP), increases the pulse pressure (PP), and decreases the HR. Looking at just the DP and HR effects, only NE and phenylephrine ( α agonist) are possible answers (in both cases, the decrease in HR is a reflex response to the increase in BP). ACh, EPI (in a physiological dose), and isoproterenol decrease DP, and all of these drugs increase the HR (in the case of ACh, this is a reflex response to the fall in BP). Looking next at the PP effect, NE is a more likely answer than phenylephrine. Recall that the major determinant of PP is inotropic state . NE, but not phenylephrine, increases the inotropic state ( β 1 effect) and therefore increases the PP. Thus, Drug W is NE (choice C) . 8. Drug X decreases the BP and increases the HR. Of the listed choices, only trimethaphan (N N antagonist) and phentolamine ( α antagonist) are possible answers (the similarity between the responses to these two antagonists was discussed in the Physiological Tracings TBL; note that phentolamine’s effect on HR is a
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/14/2011 for the course PHARM cs taught by Professor Staff during the Spring '11 term at UCSD.

Page1 / 2

Quiz4Questions789Explanations - Cardiovascular System 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online