Top Hat Flashcards
If afterload is high, what happens to end systolic volume?
ESV is increased
Why is a factor of 2/3 in the equation fpr determining mean arterial pressure?
Diastole comprises 2/3 of the cardiac cycle?
What happens when a blood pressure cuff is completely inflated around your upper arm?
Blood flow to forearm and hand is completely arrested, the atery in your arm is completely occulded, you have no radial pulse
Why is return of venous blood to the heart impaired when heart rate is very high?
Lusitropy is low
Describe a hematocrit
% of RBCs in a sample of whole blood
Could you be anemic and have a normal hemocrit?
Yes
What are the physiological benefits of a biconcave disc shaped RBC?
Enhanced flexibility and increased surface area for exchange of CO2 and O2
How long does a RBC live?
3-4 months
What kind of capillaries would be present in the liver to remove old, worn out and decrepit RBCs from circulation?
Sinusoidal capillaries
What type of protein is hemoglobin?
Quaternary and transport
What is the difference between sickle cell trait and sickel cell disease
Sickel cell diease like expectancy is 40 years
Someone that has blood type O can recieve blood from?
O
In acromegaly, why does the bone grow in girth and not lenght?
The growth plates are fused and there is no cartilage left to develop into bone
What effect does alcohol have on ADH
Inhibits release of ADH
Which of the following is correct regarding an individual with Graves disease?
Decrease in thyroid stimulating horomone
