Health Quiz: Managing Hypertension
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Questions and Answers

What is the primary reason why people faint when standing for a prolonged period of time?

  • Increased blood flow to the brain
  • Vasoconstriction in the legs
  • Reduced blood flow to the brain due to blood pooling in the legs (correct)
  • Sudden increase in blood pressure
  • Which of these is NOT a contributing factor to hypertension?

  • Genetics
  • Exercise (correct)
  • Diet
  • Stress
  • What is the main advantage of wearing compression socks on an airplane?

  • They provide extra support for the ankles and feet
  • They reduce the risk of swelling in the legs due to prolonged sitting. (correct)
  • They help with the muscle pump by squeezing the veins
  • They prevent the formation of blood clots in the legs
  • What is considered to be the 'silent killer'?

    <p>Hypertension (C)</p> Signup and view all the answers

    What is a normal diastolic blood pressure reading?

    <p>80 (A)</p> Signup and view all the answers

    Which of the following is NOT a controllable risk factor for high blood pressure?

    <p>Age (C)</p> Signup and view all the answers

    Which of the following is a potential consequence of untreated high blood pressure?

    <p>Memory loss and dementia (A)</p> Signup and view all the answers

    What is the term for the force that blood exerts on the arterial walls during ventricular systole?

    <p>Systolic Blood Pressure (A)</p> Signup and view all the answers

    What does the DASH diet emphasize?

    <p>Fruits, vegetables, and low-fat dairy products (A)</p> Signup and view all the answers

    How much daily aerobic activity is recommended to help manage high blood pressure?

    <p>30 minutes (A)</p> Signup and view all the answers

    Which of the following is a component of the formula for Mean Arterial Pressure (MAP)?

    <p>Diastolic Blood Pressure (C)</p> Signup and view all the answers

    What does Diastolic Blood Pressure (DBP) estimate?

    <p>Peripheral Resistance (C)</p> Signup and view all the answers

    Reducing sodium intake is an effective way to manage high blood pressure. What is the recommended maximum daily sodium intake?

    <p>2400mg (B)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of cardiac muscle?

    <p>Centrally located nucleus (B)</p> Signup and view all the answers

    Which part of the nervous system is responsible for regulating involuntary actions like heart rate and digestion?

    <p>Autonomic nervous system (B)</p> Signup and view all the answers

    What is the name of the structure that separates the right and left sides of the heart?

    <p>Interventricular septum (D)</p> Signup and view all the answers

    What is the function of the pulmonary artery?

    <p>Carry deoxygenated blood from the heart to the lungs (D)</p> Signup and view all the answers

    During ventricular systole, what happens to the blood volume in the ventricles?

    <p>It decreases (A)</p> Signup and view all the answers

    What is the name of the valve that controls the flow of blood from the right ventricle to the pulmonary artery?

    <p>Pulmonary semilunar valve (C)</p> Signup and view all the answers

    Which of the following is NOT a feature of the venous system?

    <p>Carries blood away from the heart (B)</p> Signup and view all the answers

    Which part of the nervous system controls voluntary muscle movement?

    <p>Somatic nervous system (D)</p> Signup and view all the answers

    What is the approximate daily output of blood by the heart?

    <p>6000 liters (D)</p> Signup and view all the answers

    Which of the following structures allows the heart to contract as a coordinated unit?

    <p>Intercalated disks (B)</p> Signup and view all the answers

    What is the relationship between blood pressure and peripheral resistance?

    <p>Increased peripheral resistance leads to increased blood pressure. (B)</p> Signup and view all the answers

    Which of the following factors can increase peripheral resistance?

    <p>Increased blood viscosity (B)</p> Signup and view all the answers

    How does vasoconstriction affect peripheral resistance?

    <p>Vasoconstriction increases peripheral resistance. (D)</p> Signup and view all the answers

    Which of the following is NOT a source of peripheral resistance?

    <p>Cardiac output (B)</p> Signup and view all the answers

    What is the relationship between blood pressure and cardiac output?

    <p>Increased cardiac output leads to increased blood pressure. (C)</p> Signup and view all the answers

    What is the role of blood volume in regulating blood pressure?

    <p>Increased blood volume leads to increased blood pressure. (A)</p> Signup and view all the answers

    Which of the following is NOT a factor that influences blood pressure?

    <p>Hormonal changes (D)</p> Signup and view all the answers

    According to Poiseuille's Law, the relationship between pressure differential, resistance, and flow is best described as:

    <p>Flow is directly proportional to pressure differential and inversely proportional to resistance. (A)</p> Signup and view all the answers

    During exercise, which physiological change directly contributes to an increase in myocardial oxygen consumption?

    <p>Increased heart rate (A), Increased blood pressure (D)</p> Signup and view all the answers

    What is the primary function of the SA node in the cardiovascular system?

    <p>To control the heart rate and rhythm (B)</p> Signup and view all the answers

    How is the rate pressure product (RPP) calculated?

    <p>Heart rate x systolic blood pressure (B)</p> Signup and view all the answers

    Which of the following is NOT a factor contributing to an increase in coronary blood flow during exercise?

    <p>Increased venous return (C)</p> Signup and view all the answers

    What is the 'intrinsic rhythm' of the SA node, and what does it represent?

    <p>A steady, rhythmic electrical signal that initiates heart contractions, approximately 100 beats per minute (B)</p> Signup and view all the answers

    What is the primary factor that influences blood flow within the circulatory system?

    <p>Radius of the blood vessels (B)</p> Signup and view all the answers

    Which of these conditions directly contributes to an increase in blood pressure?

    <p>All of the above (D)</p> Signup and view all the answers

    When does the majority of coronary blood flow occur?

    <p>During diastole (heart relaxation) (D)</p> Signup and view all the answers

    What is the direct physiological consequence of a coronary heart blockage (myocardial infarction)?

    <p>Reduced blood flow to the heart muscle (B)</p> Signup and view all the answers

    What is the significance of the arteriovenous oxygen difference (a-vO2 difference) in determining muscle oxygen utilization?

    <p>It reflects the percentage of oxygen extracted from the blood by the muscles. (A)</p> Signup and view all the answers

    Which of these factors contributes to the high oxygen consumption of the myocardium?

    <p>All of the above (D)</p> Signup and view all the answers

    What is the approximate percentage of oxygen extracted by the myocardium from the circulated blood?

    <p>70-80% (A)</p> Signup and view all the answers

    What is the primary function of the coronary veins?

    <p>To carry deoxygenated blood back to the heart. (A)</p> Signup and view all the answers

    Flashcards

    One-way valves

    Valves that prevent backflow of blood in veins, aiding venous return.

    Muscle pump

    The mechanism by which muscle contractions help blood return to the heart.

    Varicose veins

    Swollen, twisted veins caused by pooling blood due to valve failure.

    Blood pressure (BP)

    The force exerted on blood vessel walls by circulating blood.

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    Hypertension

    Condition defined by abnormally high blood pressure, often without symptoms.

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    Coronary blood flow

    The increase of blood supply to the heart during exercise due to factors like heart rate and vasodilation.

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    Myocardial oxygen consumption

    The amount of oxygen the heart muscle uses, which relates to how hard it works.

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    Rate Pressure Product (RPP)

    A calculation of myocardial oxygen consumption, expressed as HR multiplied by SBP.

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    SA node

    The natural pacemaker of the heart that initiates its rhythm and controls heart rate.

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    Blood Pressure

    The force of blood against artery walls; affected by various factors.

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    Intrinsic heart rate

    The inherent rate at which the heart beats, typically about 100 beats per minute without external influence.

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    Peripheral Resistance

    Resistance in the blood vessels that affects blood flow and pressure.

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    Vessel Diameter

    Width of blood vessels; narrower vessels increase resistance to flow.

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    Blood Viscosity

    Thickness of blood; higher viscosity increases resistance.

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    Blood Volume

    Total amount of blood in circulation; affects blood pressure and flow.

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    Cardiac Output (Q)

    The volume of blood the heart pumps per minute; affects blood pressure.

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    Poiseuille’s Law

    Describes how pressure, resistance, and flow are related in a fluid system.

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    Factors Affecting BP

    Includes peripheral resistance, vessel elasticity, blood volume, cardiac output.

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    CNS

    Central Nervous System; consists of the brain and spinal cord.

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    PNS

    Peripheral Nervous System; includes all neural elements outside the CNS.

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    Afferent

    Neural pathways that carry signals to the CNS.

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    Efferent

    Neural pathways that carry signals away from the CNS.

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    Autonomic Nervous System

    Part of PNS controlling involuntary functions; includes sympathetic and parasympathetic.

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    Myocardium

    The muscular middle layer of the heart responsible for contraction.

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    Ventricular Diastole

    Phase of the cardiac cycle when ventricles relax and fill with blood.

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    Ventricular Systole

    Phase of the cardiac cycle when ventricles contract to pump blood out.

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    End-Systolic Volume (ESV)

    Volume of blood left in the ventricles after contraction.

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    Pulmonary Artery

    The only artery that carries deoxygenated blood from the heart.

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    Untreated high blood pressure

    Can lead to heart attack, stroke, dementia, and more.

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    Uncontrollable risk factors

    Factors such as age, sex, and family history that increase risk.

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    Controllable risk factors

    Lifestyle choices like diet, exercise, and stress that can be managed.

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    Systolic Blood Pressure (SBP)

    Pressure during heart contractions, indicating heart workload.

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    Diastolic Blood Pressure (DBP)

    Pressure when the heart relaxes, indicating blood flow resistance.

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    Mean Arterial Pressure (MAP)

    Average pressure during the cardiac cycle, indicating blood circulation.

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    DASH diet

    A diet rich in fruits, vegetables, and low-fat dairy aiming to lower BP.

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    Blood Pressure Formula

    BP = Cardiac Output x Total Peripheral Resistance.

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    Pressure Difference

    The change in pressure from high to low that causes blood to flow.

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    Atherosclerosis

    Narrowing of arteries due to plaque buildup, leading to increased blood pressure.

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    Arteriosclerosis

    Hardening of arteries, decreasing elasticity and ability to absorb pressure.

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    Coronary Circulation

    The system of blood flow to the heart muscle itself.

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    Myocardial Infarction

    Also known as a heart attack, caused by a blood clot in coronary arteries.

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    a-vO2 Difference

    The difference in oxygen content between arterial and venous blood, indicating muscle oxygen utilization.

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    Cardiac Output

    The volume of blood the heart pumps in a minute, often denoted as Q.

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    Coronary Arteries

    Arteries that supply blood to the heart muscle, branching from the aorta.

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    Study Notes

    Cardiovascular System Organization

    • The central nervous system (CNS) includes the brain and spinal cord.
    • The peripheral nervous system (PNS) encompasses everything else.
    • Afferent pathways carry sensory information to the CNS.
    • Efferent pathways carry signals from the brain to effectors.
    • The autonomic system controls involuntary actions, broken down into the sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) pathways.
    • The somatic system controls voluntary actions.

    Heart Structure and Function

    • The heart is a pump, lying mostly on the left side of the chest cavity.
    • It has four chambers: two atria and two ventricles.
    • The right and left sides are separated by the intraventricular septum.
    • Cardiac output is approximately 6000 liters per day.
    • The myocardium is the muscle of the heart.
    • Striated and involuntary cardiac muscle cells are connected by intercalated disks, allowing synchronized contractions.

    Cardiac vs. Skeletal Muscle

    • Both are striated.
    • Cardiac muscle is involuntary; skeletal muscle is voluntary.
    • Cardiac muscle responds to stretch/tension; skeletal muscle does.
    • Cardiac muscle's intercalated disks allow electrical signals to spread quickly.

    Ventricular Contraction and Relaxation

    • Ventricular diastole is the relaxation phase, allowing ventricles to fill with blood.
    • Ventricular systole is the contraction phase, pushing blood through the circulatory system.

    Systemic Circulation

    • Arteries carry blood away from the heart (mostly oxygenated).
    • Pulmonary artery is an exception - carries deoxygenated blood to the lungs.
    • Capillaries allow for the exchange of oxygen and nutrients.
    • Veins carry oxygen poor blood back to the heart (mostly deoxygenated).
    • Pulmonary veins carry oxygenated blood from the lungs back to the heart.
    • Blood pressure (BP) is the force exerted by blood on vessel walls.
    • BP is calculated as cardiac output multiplied by total peripheral resistance.
    • Factors affecting BP include cardiac output, vessel elasticity, blood viscosity and vessel length.
    • Uncontrolled high blood pressure (hypertension) can lead to serious health problems including heart attack, stroke, kidney failure and dementia.

    Coronary Circulation

    • The heart requires its own blood supply.
    • Coronary arteries branch off the aorta and supply blood to the heart muscle. Blood flow occurs primarily during diastole (relaxation)
    • Coronary heart blockage can result in a myocardial infarction (heart attack).

    Oxygen Consumption and Regulation

    • Myocardial oxygen consumption is significantly influenced by factors including exercise and heart rate.
    • The acronym RPP stands for Rate Pressue Product - HR x SBP, used in the estimation of myocardial oxygen consumption.

    Cardiovascular Regulation and Integration

    • The heart has an intrinsic rhythm generated by the sinoatrial (SA) node, which serves as the pacemaker.
    • The autonomic nervous system regulates heart rate.

    Blood Composition and Other Info

    • Blood is comprised of plasma (liquid portion) and formed elements (cells & platelets).
    • About 55% of blood is plasma and 45% of blood is formed elements (RBCs, WBCs and platelets).
    • Hemoglobin within red blood cells transports oxygen.
    • Blood doping is a way athletes try to artificially increase RBC count.

    Cardiovascular Control Center

    • Located in the medulla of the brainstem
    • Regulates heart rate and output, blood vessel diameter etc. via autonomic nervous system.

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    Test your knowledge on hypertension and related health factors with this quiz. Covering topics such as blood pressure readings, diet recommendations, and risk factors, you will learn about the various aspects of managing high blood pressure effectively.

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