QUESTIONS FOR CIRCULATORY SYSTEM
Name 4 things found in Plasma
1. water 2. carbon dioxide 3. glucose 4. urea
Which substances are dissolved in plasma?
glucose, urea, hormones
Where does haemoglobin become oxyhemoglobin?
in the lungs
Which chamber of the heat has the thickest muscle wall?
left ventricle
When the blood is flowing through a vena cava, which main blood vessel will it flow through next?
pulmonary artery
What is the sequence for blood being pumped from the heart to lungs?
right atrium, right ventricle, pulmonary artery
Name the muscular wall which separates the left and right side of the heart?
septum
For blood to reach the left side from the right, what must it pass?
the capillaries
What is the correct path through the circulatory system which describes the passage of a blood clot from the left leg?
vena cave, right atrium, right ventricle, lungs, left atrium, left ventricle, aorta
In a person with a low platelet level, which process is slower than normal?
Blood clotting
In terms of being open or closed, what is the state of the mitral and tricuspid valves (left and right atrioventricular valves, respectively) at the end of the first heart sound?
Both are closed
What blood vessels deliver and takes away blood from the liver and kidney
LIVER: delivers = hepatic portal vein takes away = hepatic vein KIDNEY delivers = renal artery takes away = renal vein
Which blood vessel has a high concentration of carbon dioxide , low oxygen concentration and high blood pressure?
Pulmonary artery
Which heart valves do not actively close by the contraction of muscular structure?
Semilunar valves
states one advantage of double circulation?
allows the heart to pump blood pressure and force blood to move in circulation, without applying pressure to the lungs
Which structure in plants and humans carry amino acids?
arteries and phloem
Explain how the structure of an artery is related to its funtion
arteries have thick walls so they can withstand high blood pressure and a narrow lumen which also allows high blood pressure. They can also contract to control blood flow.
Why is the circulatory system of mammals described as double circulation?
blood flows through the heart twice on one complete circuit of the body
Explain how blood returns to the heart in the femoral vein against the pull of gravity
blood is forced out by pressure that the heart pumps, that moves the blood around the circulatory system. The walls of the veins are wide, to reduce resistance and the valves prevent blood from flowing back
Describe how blood is transported from the vena cava to the lungs
blood passes through the vena cava, where it enters the right ventricle then the right atrium , and flows into the pulmonary artery. Which carries blood away from the heart to the lungs
Explain why blood pressure must decrease in the arteries before entering capillaries
capillaries are one cell thick, so if the blood will be supplied at high pressure they will burst
What does the Hepatic Portal Vein do?
carries blood from the digestive system to the liver which can then by sent to the heart. It can also stop blood from clogging up
Describe one named example of a surgery that can treat CHD
coronary artery bypass operation: a blood vessel is taken away from somewhere else in the body and put in the space between the aorta and unblocked part of the artery, this will increase blood flow.
