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PHGY 210 Cardiovascular Physiology Exam Questions And Accurate Answers
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PHGY 210 Cardiovascular Physiology ExamQuestions And Accurate Answers
What does the cardiovascular system basically do? -Answer transportation of nutrients,
hormones, immune cells etc
Name 8 functions of cardiovascular systems? - Answer 1-intake of nutrients within the
body
2-delivery of fuel to the cells
3-removal of waste products
4-circulation of hormones
5-circulation of immune cells and antibodies
6-regulation of pH
7-water balance
8- thermoregulation
where and does the ameoba get its o2? - Answer from the water and by process of
diffusion since the [02] outside the cell is higher than inside
what is diffusion? - Answer spontaneous movement of particles caused by random
thermal motion
how can single cardiac cells survive on diffusion? - Answer bc the distance 02 has to
travel is very small
how capillaries per myocyte? - Answer 1
How is the heart very vascularized? - Answer bc the capillaries are very close to each
, heart cell, so they bring fuel and take away waste efficiently
What is Fick's Law? - Answer flow=Dx [ ] gradient x area
How can the concentration gradient be found? - Answer (cout-cin)/d
What 2 things does the diffusion coefficient depend on? - Answer 1-the substance
2-the medium thru which the substance is diffusing
Why 1 billion alveoli? - Answerto increase surface area to have more diffusion
What is a gradient? - Answer spacial rate of change of a variable
What is flux? - Answer flow/area
How many times bigger is the Dc02 compared to D02 in water? - Answer 20x so need
smaller change in [ ] to get the same flow
Explain the mechanisms of diffusion/convection to deliver 02 to the cells. (4 steps) -
Answer 1- 02 enters the lungs thru bulk flow/convective flow
2-02 diffuses thru the alveolus and then to the blood
3-02 is convected by blood to the tissue
4-02 diffuses from RBCS into the cell
Explain how C02 is eliminated - Answer 1-C02 diffuses into the blood capillary
2- Blood containing c02 is convected back to the lungs
3-C02 diffuses thru the alveolus
4-C02 is convected out by expiration
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