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Posts: 54
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6 years ago
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6 years ago
 i know this is lengthy, but if you can answer  activities 3, 4 & 8 that would be great.Activity 3How does flow tube length affect fluid flow?What effect do you think obesity would have on blood flow?Hint: Relate obesity to changes in blood vessel length.Activity 4How does driving pressure affect fluid flow?How does this plot differ from the plots for tube radius,viscosity, and tube length? Although changing pressure could be used as a means of  blood flow control, explain why this approach would not be as effective as altering blood vessel radius.Activity 8Now decrease the right flow tube radius to 2.5 mm, and runanother trial. How does this flow rate compare with “normal”? Think logically about what condition(s) might compensatefor a decrease in flow tube radius. How were you able to accomplish this? (Hint: There are several ways.)Circle the correct term within the parentheses: Decreasingthe right flow tube radius is similar to a partial (leakage /blockage) of the aortic valve or (increased / decreased) resistance in the arterial system.Explain how the human heart might compensate for such acondition.To increase (or decrease) blood flow to only one particularbody system (e.g., digestive), would it be better to adjustheart rate or blood vessel diameter? Explain.Complete the following statements by circling the correct response   a.  if we decreased the overall peripheral resistance in the human body ( as an athlete), the heart would need to generate (more/less) pressure to deliver an adequate amount of blood flow, and arterial pressure would be ( higher/ lower)    b.  If the diameter of the arteries of the body were partley filled with fatty deposits, the heart would need to generate ( more / less ) force to maintain blood flow, and pressure in the arterial system would be ( higher/ lower) than normal
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6 years ago
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6 years ago
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Educator
6 years ago
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6 years ago
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Educator
6 years ago
 Quote from: sta2jb (6 years ago)bio, thanks so much for your answers, but i'm not understanding the answer.  are you answering all of activity 8 or partial?I just posted what is written in the solutions manual.
lena213
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6 years ago
 Modifiers of Heart RateActivity 3: Effect of Epinephrine      1. What was the effect of epinephrine on heart rate? Epinephrine is an adrenergic agonist which binds to adrenergic receptors such as B1 and B2, or Alpha 1... these increase the HR      2. Does this effect mimic the effect of the sympathetic nervous system or that of the parasympathetic  nervous system? Sympathetic nervous system      3. What is the heart rate when the status window reads Heart Rate Stable? 81Activity 4: Effect of Pilocarpine      1. What was the effect of pilocarpine on heart rate? Pilocarpine is a direct acting cholinergic agonist which decreases heart rate by directly acting on the receptor.....this acts the same as acetylcholine      2. What is the heart rate when the status window reads Heart Rate Stable? 47
lena213
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6 years ago
 Sorry I dont think this is what you were looking for! Sorry about that
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6 years ago
 bio_man thanks for your help.  i was able to figure it out.  It there anyway i can get answers to the posting for Chapter 5 Cardiovascular Dynamics review sheet?agaom. thanks for your help.