$CATEGORY: Science - Khan Academy/6.Life Processes/6.Life Processes--Transportation

//Multiple Choice

The heart pumps oxygenated blood to the body through the\: {
    ~Pulmonary artery
    =Aorta
    ~Vena cava
    ~Pulmonary vein
}

Deoxygenated blood enters the heart through the\: {
    ~Pulmonary vein
    =Vena cava
    ~Aorta
    ~Left atrium
}

The chamber of the heart that receives oxygenated blood from the lungs is\: {
    ~Right atrium
    =Left atrium
    ~Right ventricle
    ~Left ventricle
}

Which valve prevents backflow of blood from the right ventricle to the right atrium? {
    ~Mitral valve
    =Tricuspid valve
    ~Pulmonary valve
    ~Aortic valve
}

Blood flows from the left ventricle to the\: {
    ~Lungs
    ~Right atrium
    =Aorta
    ~Pulmonary artery
}

The pulmonary artery carries\: {
    ~Oxygenated blood to the lungs
    =Deoxygenated blood to the lungs
    ~Oxygenated blood to the heart
    ~Deoxygenated blood to the heart
}

The heart has how many chambers? {
    ~2
    =4
    ~3
    ~5
}

Which valve prevents backflow of blood into the left ventricle? {
    ~Tricuspid valve
    ~Pulmonary valve
    =Aortic valve
    ~Mitral valve
}

The function of the septum in the heart is to\: {
    ~Pump blood
    =Separate oxygenated and deoxygenated blood
    ~Regulate blood pressure
    ~Filter blood
}

Oxygenated blood from the lungs flows to the heart through the\: {
    ~Pulmonary artery
    =Pulmonary vein
    ~Vena cava
    ~Aorta
}

//True or False

The left ventricle pumps oxygenated blood to the body. {T}

The pulmonary vein carries deoxygenated blood. {F}

The tricuspid valve prevents backflow of blood into the right atrium. {T}

The septum separates the two ventricles of the heart. {T}

The aorta carries oxygenated blood to the lungs. {F}

The right atrium receives deoxygenated blood from the body. {T}

The pulmonary artery carries oxygenated blood. {F}

The mitral valve is also called the bicuspid valve. {T}

The heart has two atria and two ventricles. {T}

The vena cava carries oxygenated blood to the heart. {F}

//Fill in the blanks

The heart is made up of ______ chambers. {
    =4
    ~2
}

The valve between the right atrium and right ventricle is the ______ valve. {
    =Tricuspid
    ~Mitral
}

The left ventricle pumps blood into the ______. {
    =Aorta
    ~Pulmonary artery
}

Deoxygenated blood is carried to the lungs by the ______ artery. {
    =Pulmonary
    ~Coronary
}

Oxygenated blood from the lungs enters the ______ atrium. {
    =Left
    ~Right
}

The ______ valve prevents backflow of blood into the left atrium. {
    =Mitral
    ~Aortic
}

The largest artery in the human body is the ______. {
    =Aorta
    ~Pulmonary artery
}

The ______ carries deoxygenated blood to the heart from the body. {
    =Vena cava
    ~Pulmonary vein
}

Blood flows from the right ventricle to the lungs through the ______ valve. {
    =Pulmonary
    ~Tricuspid
}

The septum divides the heart into ______ halves. {
    =Two
    ~Four
}

//Numericals

If the heart beats 72 times per minute, how many times does it beat in an hour? {
    =4,320
    ~3,600
    ~4,200
    ~4,500
}

If the stroke volume of the heart is 70 mL and the heart beats 75 times per minute, what is the cardiac output? {
    =5.25 L/min
    ~6.25 L/min
    ~7.25 L/min
    ~4.25 L/min
}

The total blood volume in an adult human is 5 liters. If the heart pumps 70 mL per beat, how many beats are required to pump the entire blood volume? {
    ~50
    ~70
    =100
    ~72
}

A person's heart beats 80 times per minute, and the stroke volume is 60 mL. What is the cardiac output in liters per minute? {
    =4.8 L/min
    ~5.6 L/min
    ~6.4 L/min
    ~7.2 L/min
}

If the heart pumps 5 liters of blood per minute, how much blood is pumped in 24 hours? {
    =7,200 liters
    ~8,000 liters
    ~6,500 liters
    ~7,500 liters
}

A heart pumps 70 mL of blood per beat. If it beats 100 times in a minute, how much blood is pumped in 5 minutes? {
    ~35 liters
    ~3.5 liters
    =7 liters
    ~7.5 liters
}

If a person's heart rate increases from 70 bpm to 90 bpm, and the stroke volume remains 70 mL, what is the new cardiac output? {
    ~5.5 L/min
    =6.3 L/min
    ~6.9 L/min
    ~7.5 L/min
}

The heart pumps 5 liters of blood per minute. How much blood does it pump in one second? {
    =83 mL
    ~85 mL
    ~75 mL
    ~80 mL
}

A heart pumps 70 mL of blood per beat. How many beats are needed to pump 10 liters of blood? {
    =143
    ~140
    ~150
    ~130
}

If the cardiac output is 6 L/min and the heart rate is 100 bpm, what is the stroke volume? {
    =60 mL
    ~70 mL
    ~80 mL
    ~90 mL
}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Aorta -> Pumps oxygenated blood to the body
=Pulmonary vein -> Carries oxygenated blood from the lungs
=Tricuspid valve -> Prevents backflow into right atrium
=Left Ventricle -> Pumps oxygenated blood to the body
}


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