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Questions and Answers
What is the primary reason why people faint when standing for a prolonged period of time?
What is the primary reason why people faint when standing for a prolonged period of time?
Which of these is NOT a contributing factor to hypertension?
Which of these is NOT a contributing factor to hypertension?
What is the main advantage of wearing compression socks on an airplane?
What is the main advantage of wearing compression socks on an airplane?
What is considered to be the 'silent killer'?
What is considered to be the 'silent killer'?
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What is a normal diastolic blood pressure reading?
What is a normal diastolic blood pressure reading?
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Which of the following is NOT a controllable risk factor for high blood pressure?
Which of the following is NOT a controllable risk factor for high blood pressure?
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Which of the following is a potential consequence of untreated high blood pressure?
Which of the following is a potential consequence of untreated high blood pressure?
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What is the term for the force that blood exerts on the arterial walls during ventricular systole?
What is the term for the force that blood exerts on the arterial walls during ventricular systole?
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What does the DASH diet emphasize?
What does the DASH diet emphasize?
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How much daily aerobic activity is recommended to help manage high blood pressure?
How much daily aerobic activity is recommended to help manage high blood pressure?
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Which of the following is a component of the formula for Mean Arterial Pressure (MAP)?
Which of the following is a component of the formula for Mean Arterial Pressure (MAP)?
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What does Diastolic Blood Pressure (DBP) estimate?
What does Diastolic Blood Pressure (DBP) estimate?
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Reducing sodium intake is an effective way to manage high blood pressure. What is the recommended maximum daily sodium intake?
Reducing sodium intake is an effective way to manage high blood pressure. What is the recommended maximum daily sodium intake?
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Which of the following is NOT a characteristic of cardiac muscle?
Which of the following is NOT a characteristic of cardiac muscle?
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Which part of the nervous system is responsible for regulating involuntary actions like heart rate and digestion?
Which part of the nervous system is responsible for regulating involuntary actions like heart rate and digestion?
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What is the name of the structure that separates the right and left sides of the heart?
What is the name of the structure that separates the right and left sides of the heart?
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What is the function of the pulmonary artery?
What is the function of the pulmonary artery?
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During ventricular systole, what happens to the blood volume in the ventricles?
During ventricular systole, what happens to the blood volume in the ventricles?
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What is the name of the valve that controls the flow of blood from the right ventricle to the pulmonary artery?
What is the name of the valve that controls the flow of blood from the right ventricle to the pulmonary artery?
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Which of the following is NOT a feature of the venous system?
Which of the following is NOT a feature of the venous system?
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Which part of the nervous system controls voluntary muscle movement?
Which part of the nervous system controls voluntary muscle movement?
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What is the approximate daily output of blood by the heart?
What is the approximate daily output of blood by the heart?
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Which of the following structures allows the heart to contract as a coordinated unit?
Which of the following structures allows the heart to contract as a coordinated unit?
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What is the relationship between blood pressure and peripheral resistance?
What is the relationship between blood pressure and peripheral resistance?
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Which of the following factors can increase peripheral resistance?
Which of the following factors can increase peripheral resistance?
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How does vasoconstriction affect peripheral resistance?
How does vasoconstriction affect peripheral resistance?
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Which of the following is NOT a source of peripheral resistance?
Which of the following is NOT a source of peripheral resistance?
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What is the relationship between blood pressure and cardiac output?
What is the relationship between blood pressure and cardiac output?
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What is the role of blood volume in regulating blood pressure?
What is the role of blood volume in regulating blood pressure?
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Which of the following is NOT a factor that influences blood pressure?
Which of the following is NOT a factor that influences blood pressure?
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According to Poiseuille's Law, the relationship between pressure differential, resistance, and flow is best described as:
According to Poiseuille's Law, the relationship between pressure differential, resistance, and flow is best described as:
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During exercise, which physiological change directly contributes to an increase in myocardial oxygen consumption?
During exercise, which physiological change directly contributes to an increase in myocardial oxygen consumption?
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What is the primary function of the SA node in the cardiovascular system?
What is the primary function of the SA node in the cardiovascular system?
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How is the rate pressure product (RPP) calculated?
How is the rate pressure product (RPP) calculated?
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Which of the following is NOT a factor contributing to an increase in coronary blood flow during exercise?
Which of the following is NOT a factor contributing to an increase in coronary blood flow during exercise?
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What is the 'intrinsic rhythm' of the SA node, and what does it represent?
What is the 'intrinsic rhythm' of the SA node, and what does it represent?
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What is the primary factor that influences blood flow within the circulatory system?
What is the primary factor that influences blood flow within the circulatory system?
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Which of these conditions directly contributes to an increase in blood pressure?
Which of these conditions directly contributes to an increase in blood pressure?
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When does the majority of coronary blood flow occur?
When does the majority of coronary blood flow occur?
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What is the direct physiological consequence of a coronary heart blockage (myocardial infarction)?
What is the direct physiological consequence of a coronary heart blockage (myocardial infarction)?
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What is the significance of the arteriovenous oxygen difference (a-vO2 difference) in determining muscle oxygen utilization?
What is the significance of the arteriovenous oxygen difference (a-vO2 difference) in determining muscle oxygen utilization?
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Which of these factors contributes to the high oxygen consumption of the myocardium?
Which of these factors contributes to the high oxygen consumption of the myocardium?
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What is the approximate percentage of oxygen extracted by the myocardium from the circulated blood?
What is the approximate percentage of oxygen extracted by the myocardium from the circulated blood?
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What is the primary function of the coronary veins?
What is the primary function of the coronary veins?
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Flashcards
One-way valves
One-way valves
Valves that prevent backflow of blood in veins, aiding venous return.
Muscle pump
Muscle pump
The mechanism by which muscle contractions help blood return to the heart.
Varicose veins
Varicose veins
Swollen, twisted veins caused by pooling blood due to valve failure.
Blood pressure (BP)
Blood pressure (BP)
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Hypertension
Hypertension
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Coronary blood flow
Coronary blood flow
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Myocardial oxygen consumption
Myocardial oxygen consumption
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Rate Pressure Product (RPP)
Rate Pressure Product (RPP)
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SA node
SA node
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Blood Pressure
Blood Pressure
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Intrinsic heart rate
Intrinsic heart rate
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Peripheral Resistance
Peripheral Resistance
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Vessel Diameter
Vessel Diameter
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Blood Viscosity
Blood Viscosity
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Blood Volume
Blood Volume
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Cardiac Output (Q)
Cardiac Output (Q)
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Poiseuille’s Law
Poiseuille’s Law
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Factors Affecting BP
Factors Affecting BP
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CNS
CNS
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PNS
PNS
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Afferent
Afferent
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Efferent
Efferent
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Autonomic Nervous System
Autonomic Nervous System
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Myocardium
Myocardium
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Ventricular Diastole
Ventricular Diastole
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Ventricular Systole
Ventricular Systole
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End-Systolic Volume (ESV)
End-Systolic Volume (ESV)
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Pulmonary Artery
Pulmonary Artery
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Untreated high blood pressure
Untreated high blood pressure
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Uncontrollable risk factors
Uncontrollable risk factors
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Controllable risk factors
Controllable risk factors
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Systolic Blood Pressure (SBP)
Systolic Blood Pressure (SBP)
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Diastolic Blood Pressure (DBP)
Diastolic Blood Pressure (DBP)
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Mean Arterial Pressure (MAP)
Mean Arterial Pressure (MAP)
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DASH diet
DASH diet
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Blood Pressure Formula
Blood Pressure Formula
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Pressure Difference
Pressure Difference
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Atherosclerosis
Atherosclerosis
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Arteriosclerosis
Arteriosclerosis
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Coronary Circulation
Coronary Circulation
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Myocardial Infarction
Myocardial Infarction
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a-vO2 Difference
a-vO2 Difference
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Cardiac Output
Cardiac Output
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Coronary Arteries
Coronary Arteries
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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 and Related Factors
- 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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Description
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.