31 Questions
What is the main function of the sarcoplasmic reticulum in muscle cells?
Storage of calcium
Which event triggers the release of calcium from the sarcoplasmic reticulum?
Atrial depolarization
What percentage of calcium in muscle cells comes from the sarcoplasmic reticulum?
80-90%
During which phase of the cardiac cycle do the ventricles relax?
Ventricular repolarization
Which part of the heart's conduction system is responsible for conducting the excitation to the ventricles?
Right and left bundle branches
What is the role of the medulla oblongata in cardiac innervation?
Cardioacceleration
What is the formula to calculate Stroke Volume?
EDV - ESV
Which factor affects Stroke Volume by changing the length of muscle fibers?
Preload
What is the main effect of increased contractility on Stroke Volume?
Increases Stroke Volume
Which neurotransmitter is involved in Parasympathetic Control of heart rate?
Acetylcholine
How do catecholamines affect heart function through sympathetic control?
Act on β1-adrenergic receptors
What anatomical structures form the 4 chambers of the heart during embryology?
Sinus venosus, Atrium, Ventricle, Bulbis cordis
What adaptation is crucial in fetal heart circulation before birth?
Foramen Ovale
What is the function of the epicardium?
Protection of the heart muscle
Which blood vessel supplies the anterior interventricular artery in coronary circulation?
Circumflex artery
What do pacemaker cells in the heart do?
Spontaneously depolarize
Which layer of the heart is responsible for the transportation of gases and nutrients?
Endocardium
Where are the papillary muscles located in the heart?
Attached to the chordae tendineae
What causes Angina pectoris?
Coronary artery blockage
What is a characteristic of cardiac myocytes?
Striated appearance
Which layer of the pericardium consists of parietal and visceral layers?
Serous Pericardium
Hypotension is defined as blood pressure above 90/60mmHg.
False
Anaphylactic shock is a type of Vascular Shock.
True
Vesicular transport is a method of Capillary Exchange involving the movement of molecules.
False
Hydrostatic Pressure in Capillary Exchange refers to the pressure of interstitial fluid.
False
Colloid Osmotic Pressure involves the osmotic pressure of blood.
True
Angina Pectoris is derived from Latin words meaning heart and lungs.
False
Electrocardiography refers to the study of heart sounds.
False
Valvuloplasty is a procedure specifically performed on veins.
False
Arteritis refers to the inflammation of veins.
False
Phlebitis is a condition that affects arteries.
False
Test your knowledge on the general information, pump systems, location, structure, chambers, valves, chordae tendonae, and papillary muscles of the heart as covered in Chapter 18 of Cardiovascular Physiology.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
