ADA NBDE National Board Dental Part I

Category - NBDE

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Which of the following statements is not true of total peripheral resistance (TPR)?

it is influenced by sympathetic activation
it is directly proportional to cardiac output
it is directly proportional to mean arterial pressure
it is influenced by thermal changes

Explanation

Answer: B - TPR is the vascular resistance of the systemic circulation. Thus, TPR is indirectly proportional to cardiac output.

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