IFS 1 Exam 1 Study Guide: Units 1-2
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Questions and Answers

What is the function of arteries in the cardiovascular system?

  • To distribute hormones throughout the body
  • To bring blood back to the heart
  • To filter blood before it enters the heart
  • To transport oxygenated blood away from the heart (correct)
  • Which of the following correctly describes the anatomy of the heart?

  • The endocardium is the outermost layer
  • The epicardium is the internal layer lining the chambers
  • The pericardium is a tough membranous sac encasing the heart (correct)
  • The myocardium is the connective tissue surrounding the heart
  • How does an increase in heart rate impact movement?

  • Reduces the demand for oxygen in muscles
  • Limits the amount of blood being pumped
  • Increases the heart's efficiency in pumping blood (correct)
  • Decreases oxygen delivery to muscles
  • Where is the apex of the heart located?

    <p>Inferior and positioned toward the left</p> Signup and view all the answers

    Which of the following structures is located anterior to the esophagus?

    <p>The heart</p> Signup and view all the answers

    What pathway does blood follow as it leaves the heart?

    <p>From arteries to capillaries to veins</p> Signup and view all the answers

    What type of blood vessels return blood to the heart?

    <p>Veins</p> Signup and view all the answers

    How many lobes do the lungs have?

    <p>3 lobes in the right lung, 2 in the left lung</p> Signup and view all the answers

    Which artery is associated with the posterior interventricular artery?

    <p>Right Coronary Artery</p> Signup and view all the answers

    What structure carries deoxygenated blood from the body to the right atrium of the heart?

    <p>Inferior and Superior Vena Cava</p> Signup and view all the answers

    What is the primary electrical function of contractile cardiac muscle cells?

    <p>Contract based on an electrical signal</p> Signup and view all the answers

    Which of the following valves prevents backflow of blood from the right ventricle into the right atrium?

    <p>Tricuspid Valve</p> Signup and view all the answers

    What role does calcium play in the activity of autorhythmic cells?

    <p>It is required for generating action potential to threshold</p> Signup and view all the answers

    Where is the first point of depolarization in the heart located?

    <p>SA Node</p> Signup and view all the answers

    What type of muscle is the heart composed of?

    <p>Cardiac Muscle</p> Signup and view all the answers

    What does the P Wave in an ECG represent?

    <p>Atrial Depolarization</p> Signup and view all the answers

    Which type of heart muscle cell is responsible for generating the electrical signal for contraction?

    <p>Pacemaker Cells</p> Signup and view all the answers

    What is the significance of the delay in the electrical signal between the SA node and AV node?

    <p>Allows time for the atria to fill with blood</p> Signup and view all the answers

    What is the purpose of the heart valves?

    <p>To prevent backflow of blood</p> Signup and view all the answers

    Which structure conducts the electrical signal from the AV node to the ventricles?

    <p>Bundle of His</p> Signup and view all the answers

    Which vessels provide the primary blood supply to the heart muscle itself?

    <p>Coronary Arteries</p> Signup and view all the answers

    What is the main function of the coronary sinus?

    <p>To drain deoxygenated blood from the heart muscle</p> Signup and view all the answers

    Which of the following is a characteristic of contractile cells in the heart?

    <p>Have intercalated disks</p> Signup and view all the answers

    What structure carries oxygenated blood from the lungs to the left atrium?

    <p>Pulmonary Veins</p> Signup and view all the answers

    What event in the cardiac cycle follows atrial systole?

    <p>Ventricles fill with blood</p> Signup and view all the answers

    Which phase of the cardiac cycle is associated with the QRS complex?

    <p>Ventricular depolarization</p> Signup and view all the answers

    What is the definition of stroke volume?

    <p>The amount of blood pumped by one ventricle during a single contraction</p> Signup and view all the answers

    What heart sound indicates the closure of the atrioventricular valves?

    <p>Heart Sound #1</p> Signup and view all the answers

    How does increased stretch of the cardiac muscle fibers affect stroke volume?

    <p>It increases stroke volume</p> Signup and view all the answers

    During which phase of the cardiac cycle does ventricular repolarization occur?

    <p>Ventricular diastole</p> Signup and view all the answers

    What is the typical volume of blood pumped by the heart per minute at rest?

    <p>5-6 L/min</p> Signup and view all the answers

    What role does the autonomic nervous system play in heart rate regulation?

    <p>It regulates heart rate by adjusting both sympathetic and parasympathetic activity</p> Signup and view all the answers

    What effect does the sympathetic nervous system have on heart rate?

    <p>Increases heart rate</p> Signup and view all the answers

    What is the correct order of blood flow through the cardiovascular system starting from the vena cava?

    <p>Inf/Sup Vena Cava → R Atrium → R Ventricle</p> Signup and view all the answers

    Which blood vessels typically have the highest pressure?

    <p>Arteries</p> Signup and view all the answers

    What part of the heart provides the primary driving force for pressure changes?

    <p>Left Ventricle</p> Signup and view all the answers

    According to Poiseulle’s Law, which factor has the most significant impact on resistance to blood flow?

    <p>Blood Vessel Diameter</p> Signup and view all the answers

    What is the numeric value for typical systolic and diastolic pressures?

    <p>120/80 mmHg</p> Signup and view all the answers

    Which of the following hormones is known to cause vasoconstriction?

    <p>Both B and C</p> Signup and view all the answers

    What effect does vasodilation have on blood flow?

    <p>Increases blood flow</p> Signup and view all the answers

    Which substance is primarily involved in the paracrine signaling related to vasodilation?

    <p>Adenosine</p> Signup and view all the answers

    What factors primarily influence mean arterial blood pressure?

    <p>Blood volume and cardiac output</p> Signup and view all the answers

    Which vessels prevent backflow due to the presence of valves?

    <p>Veins</p> Signup and view all the answers

    What is the primary function of the medulla oblongata in relation to the cardiovascular system?

    <p>Controlling heart rate and blood pressure</p> Signup and view all the answers

    What is the main site for hematopoiesis, the synthesis of blood cells?

    <p>Bone marrow</p> Signup and view all the answers

    Which cellular elements in blood are responsible for oxygen transport?

    <p>Red blood cells</p> Signup and view all the answers

    What does the baroreceptor reflex primarily help regulate?

    <p>Blood pressure</p> Signup and view all the answers

    Which organs depend on a constant blood supply due to their metabolic needs?

    <p>Brain and kidneys</p> Signup and view all the answers

    Study Notes

    IFS 1 Exam 1 Study Guide

    • Exam covers units 1-2, 50 multiple choice questions, equal distribution of questions from each unit.
    • Tie concepts to the main movement question: What is movement? Where does it originate? What are the key players? What influences optimal movement?
    • Use guiding questions in the unit introductions to aid studying.
    • Some video-based questions possible.

    Unit 1: Systems & Thorax

    • Cardiovascular System Overview: Know the anatomy and function of major organs, including the heart (endocardium, myocardium, epicardium, pericardium) and blood vessels. Also, know lung anatomy: superior, middle, and inferior lobes (left and right), and fissures.
    • Cardiovascular System & Movement: How does the cardiovascular system function to support movement? (e.g., increased heart rate to meet oxygen demands). Which vessels carry blood away from the heart (arteries)? Which vessels carry blood to the heart (veins)?
    • Heart Location: Know the heart's location in the thorax relative to other structures (e.g., lungs, sternum, rib cage).

    Additional Information

    • Blood Pathway: Understand the pathway through the cardiovascular system. Note which parts carry oxygenated and deoxygenated blood.
    • Heart Valves: Know the valves (tricuspid, pulmonary, mitral, aortic) and their location in the heart. Their purpose is to prevent backflow of blood.
    • Heart Muscle (Myocardium): The myocardium is composed of two main cell types: contractile cells and autorhythmic cells. Contractile cells contract due to a stimulated signal.
    • Blood Circulation: Understand how blood flow relates to the electrical signals in the heart. Be able to identify P, PR segments, QRS complex, and T wave segments on an ECG.
    • Cardiac Cycle: Define the phases of the cardiac cycle (systole and diastole). Compare the relationships between electrical signals, mechanical events, and contractility.
    • Stroke Volume: The amount of blood pumped by one ventricle during a single contraction.
    • Ejection Fraction: The percentage of end-diastolic volume ejected in one contraction.
    • Regulation of Heart Rate: How does the autonomic nervous system regulate heart rate? What are the differences between sympathetic and parasympathetic control?

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    IFS 1 Exam 1 Study Guide PDF

    Description

    Prepare for the IFS 1 Exam 1 with this comprehensive study guide covering Units 1 and 2. The exam features 50 multiple choice questions focused on cardiovascular anatomy, lung function, and their relationship to movement. Utilize guiding questions to enhance your understanding of key concepts related to optimal movement.

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