Respiratory Section Study Questions

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Biomedical Physio & Kines
BPK 205
Parveen Bawa

1. Using the blood pressure regulation ‘flow chart’, indicate at what points (variables) various pharmacological agents act to treat high blood pressure. 2. Describe how the body adapts physiologically to hypovolemia. Explain the consequences of losing > 30% blood volume. a. 10 % blood loss i. Initial result: 1. reduction of BV, SV, Q, BP, TPR ii. Response: (baroreceptors sense loss in BP) 1. Q: a. SNS  Beta adrenergic stimulation  HR + SV  Q b. SNS  Alpha adrenergic  vasoconstriction  increase Resistance and BP c. Q returns to normal after 2. HR a. Slightly higher HR because SV did not completely recover back to normal level (needed for Q to recover to normal) 3. TPR: a. Vasodilation at vital organs b. Vasoconstriction at non-vital organs c. After initial TPR increase, the TPR returns to normal within 15 min b. >30% blood loss i. Physiological changes ii. Blood flow to non vital organs significantly reduced iii. Blood flow concentrated towards vital organs (Brain, Heart) 3. Outline the changes that occur in HR, SV, and arterial pressure during an acute bout of exercise. a. HR i. SNS  Beta adrenergic stimulation  HR (linear increase) ii. Decreased PNS, none over 130 bpm b. SV i. SNS  [Ca[  contractility  increases SV ~30% ii. Greater emptying not filling c. Arterial Pressure i. Increas
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