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Physiology

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Cardiovascular System

Question
6 out of 10
 

Occlusion of common carotid artery on both sides leads to



A Increases in HR & BP

B Increases in BP & decreases in HR

C Decrease in HR & BP

D NO effect on BP & HR

Ans. A Increases in HR & BP
  1. “CNS Ischaemic response control of arterial pressure by the Brain’s vasomotor centre in response to diminished brain blood flow”:

a. Brain blood flow cerebral Ischaemiavasomotor centre excited Systemic Arterial pressure often rises to a level as high as heart can possibly pump

b. sympathetic stimulation →↑HR

[Note by occlusion of common carotid artery both side →↓Brain blood flow CNS ischaemia] Q

  1. Hypoxia brain affected first c/f

a. Less severe hypoxia causes - impaired judgement, drowsiness, dulled pain sensibility, excitement, disorientation, loss of time sense, and Headache.

b. Other symptoms/signs Anorexia, nausea, vomiting, Tachycardia (HR), and when the hypoxia is severe, Hypertension (B P).

Cardiovascular System Flashcard List

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