- what is the main difference between your ventricles and your atria?
Your atria bring blood into the heart; your ventricles pump it out. notes
- place the following events in sequence: A) the left atrium fills with blood; B) the valve between the atria and ventricles close; C) Blood is pushed out from the right ventricle
B,C,A. notes
- how long does it take for your heart to pump blood through your entire body?
about a minute. notes
- what happens to blood, which has already circulated through the body, when it moves into the heart?
the blood travels to the lungs for more oxygen. notes
- what type of tissue in the heart pumps blood throughout the body?
muscle tissue. notes
- what would happen if your circulatory system did not deliver oxygen to your body cells?
Your body cells would die. notes
- what is the main function of platelets?
helping your blood clot. notes
- the function of the atria is to
receive blood that comes into the heart. notes
- blood vessels that carry blood directly to the capillaries beds are called
arterioles. notes
- in which vessels are materials exchanged between the blood and the body cells?
capillaries. notes
- what is the blood type of a person whose plasma contains no clumping proteins?
type AB. notes
- when the left ventricles contract, blood is pumped
out of the aorta.notes
- which chamber of the heart pumps oxygen-poor blood is pumped
right ventricle. notes
- how are the antigens different from antibodies?
antigens provoke immune responses; antibodies fight off invading substances. notes. discovery stations
- which of the following is a true statement?
people with type AB blood can receive blood from any blood group. notes
- a person with type A blood can receive blood from which group or groups?
Type A and type O. discovery stations
- what happens when two incompatible blood cells mix?
a reaction destroys the foreign red blood cells. discovery stations
- if you wanted to feel pressure waves in your body, where would you touch?
anywhere where you’d take your pulse, like your neck. discovery stations
- when is the blood pressure the highest?
when blood is pumped out of the heart. discovery stations
56.during the diastole, the heart is in a(n)____ state
relaxed. notes
- which of the following statements about mature red blood cells is not true?
divide to make new cells when old ones need to be replaced. notes
- if your blood type is -O that means
you have no agglutinogens on your red blood cells. discovery stations
- explain how the unique shape of erythrocytes enables them to best carry out there function
they are flattened and biconcave(donut like) shape gives them more surface area to maximize gas exchange- which is critical because they contain hemoglobin which transports oxygen. notes
- needed substances are carried to the body cells by
blood. notes
- what is the function of the group of cells in the heart called the pacemaker?
sending out signals to the AV node. discovery stations
- if a persons blood lacked platelets, what process could not take place?
clotting of blood. notes
- what is the blood type of a person whose plasma contains only anti-B clumping proteins
Type A. notes
- when the ventricles contract, blood is pumped
out of the heart. discovery stations
- which component of blood is 90 percent water
plasma. discovery stations
- which chamber of the heart pumps oxygen poor blood to the lungs
right ventricle. notes
- how many types of circulation does the human circulatory system contain?
two. discovery stations
- You are a doctor and are treating a patient with liver failure due to chronic alcoholism. one of the results of this is reduced synthesis of plasma proteins like fibrin. what issue can you expect to arise because of this?
an Issue with coagulation of blood during blood clot. discovery stations
- define hematopoiesis. then describe the roles of two other organ systems in this process
hematopoiesis= blood cell formation. it occurs in the red bone marrow (skeletal system) and is regulated by a hormone called EPO (Endocrine system). notes
- list the three types of circuits that blood flows through in the heart and briefly describe the role of each
pulmonary circulation- oxygen poor blood is pumped through the right side of the heart and too the lungs to be oxygenated
systemic circulation- pumps oxygen rich blood through the left side of the heart and out to the rest of the body
coronary circulation- supplies the heart with its own oxygen rich blood to keep it nourishes. notes
- explain the function of the myocardium and why it is necessary for it to be thicker in one of the ventricles than the other. in your answer, be sure to clearly state which ventricle it is thicker in
the myocardium is the layer of the heart wall that contracts. it is thicker in the left ventricle than the right because the left ventricle is pumping blood out to the entire body (in the systemic circuit) which requires more force than just pumping to the lungs in the pulmonary circuit like the right ventricle. notes
- describe the pathway that blood will travel through each part of the heart and end with where oxygen-rich blood leaves the heart to head out to tissues in the body
oxygen-poor blood enters the heart through the superior vena cavas. it goes through the right atrium and then the tricuspid valve into the right ventricle. it passes through the pulmonary valve into the pulmonary trunk and out to the lungs to be oxygenated. it returns to the heart via the pulmonary veins and enters the left atrium. it goes through the mitral valve into the left ventricle and then is pumped through the aortic valve and out the aorta to the rest of the body. discovery stations
- describe three factors that cause resistance to the flow of blood through the vessels. explain which has he greatest impact and why
bloods viscosity (thicker the blood, the greater the resistance), the length of a blood vessel (longer makes more resistance), and the diameter (smaller makes more resistance) of a blood vessel . the diameter of a blood vessel has the greatest impact because the viscosity of blood and the length of a blood vessel remains relatively constant. where areas the diameter of a blood vessel can change if the vessel contracts or is blocked in someway (like a build up of cholesterol). discovery stations