PNB 2275 Exam 2 Part 1 – CIRCULATION Exam Questions and Answers| New Update with
100% Correct Answers
The Problem - blood must circulate throughout the body for it to serve its functions
Blood functions transport & exchange - delivering nutrients, removing waste
protection - immune & clotting functions
homeostasis - temperature, osmolarity, etc.
Solution: for blood a pump (the heart)
pressure from hearts pumping provides force to generate blood flow
hydrostatic pressure in heart vs veins in arteries - ranges from 80-120mmHg
in veins - ranges from 0-20mmHg
Right side of heart
Inputs + Outputs oxygen poor, coming from tissues
input - superior/inferior vena cava; deoxygenated blood from tissues
output - pulmonary artery, to collect oxygen at lungs
Left side of heart
Inputs + Outputs oxygen rich; coming from lungs
input - pulmonary veins; full of oxygen from lungs
output - aorta→oxygenated blood to tissue
human heart 2 atria and 2 ventricles
coronary artieries arise from aortic sinus (wide point)
, deliver oxygenated blood to heart cells
cardiac veins drain into coronary sinus (which opens into right atrium)
return deoxygenated blood from heart cells, back to circulation
What would be a typical pressure for a capillary? 25 mmHg
Which blood vessel type carries blood away from the heart and towards the lung?
pulmonary artery
Which chamber of the heart pumps oxygenated blood out to the systemic circulation? left
ventricle
To which chamber of the heart do the cardiac veins eventually drain? right atrium
Three key functions of vessels distribution - blood must be spread through the circulation to
all of the bodys cells
exchange - blood must provide nutrients, oxygen, and other substances
collection - blood must be gathered and returned to heart
constraints on vessel functions - distribution vessels must be able to withstand high
pressure during ventricular systole (contraction)
- distribution vessels should be able to store pressure during ventricular diastole (relaxation)
- exchange vessels should permit bi-directional flow of substances
- collection vessels should be able to deal with low pressure on return to heart
distribution vessels elastic and muscular ARTERIES (larger) & arterioles (smaller)
100% Correct Answers
The Problem - blood must circulate throughout the body for it to serve its functions
Blood functions transport & exchange - delivering nutrients, removing waste
protection - immune & clotting functions
homeostasis - temperature, osmolarity, etc.
Solution: for blood a pump (the heart)
pressure from hearts pumping provides force to generate blood flow
hydrostatic pressure in heart vs veins in arteries - ranges from 80-120mmHg
in veins - ranges from 0-20mmHg
Right side of heart
Inputs + Outputs oxygen poor, coming from tissues
input - superior/inferior vena cava; deoxygenated blood from tissues
output - pulmonary artery, to collect oxygen at lungs
Left side of heart
Inputs + Outputs oxygen rich; coming from lungs
input - pulmonary veins; full of oxygen from lungs
output - aorta→oxygenated blood to tissue
human heart 2 atria and 2 ventricles
coronary artieries arise from aortic sinus (wide point)
, deliver oxygenated blood to heart cells
cardiac veins drain into coronary sinus (which opens into right atrium)
return deoxygenated blood from heart cells, back to circulation
What would be a typical pressure for a capillary? 25 mmHg
Which blood vessel type carries blood away from the heart and towards the lung?
pulmonary artery
Which chamber of the heart pumps oxygenated blood out to the systemic circulation? left
ventricle
To which chamber of the heart do the cardiac veins eventually drain? right atrium
Three key functions of vessels distribution - blood must be spread through the circulation to
all of the bodys cells
exchange - blood must provide nutrients, oxygen, and other substances
collection - blood must be gathered and returned to heart
constraints on vessel functions - distribution vessels must be able to withstand high
pressure during ventricular systole (contraction)
- distribution vessels should be able to store pressure during ventricular diastole (relaxation)
- exchange vessels should permit bi-directional flow of substances
- collection vessels should be able to deal with low pressure on return to heart
distribution vessels elastic and muscular ARTERIES (larger) & arterioles (smaller)
