HSF 2 Exam 2
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Questions and Answers

What is the main function of the Sarcoplasmic Reticulum in muscle cells?

  • Generating ATP
  • Producing new muscle fibers
  • Releasing sodium
  • Storing calcium (correct)

Which event triggers the release of calcium from the Sarcoplasmic Reticulum?

  • Sodium diffusion
  • Chloride accumulation
  • Potassium release
  • Extracellular calcium influx (correct)

What percentage of calcium found in muscle cells comes from the Sarcoplasmic Reticulum?

  • 10-20%
  • 80-90% (correct)
  • 50-60%
  • 30-40%

Which part of the heart is responsible for atrial depolarization?

<p>SA node (B)</p> Signup and view all the answers

During which phase of the Cardiac Cycle do the ventricles relax?

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

What is the main function of Noncontractile cardiac Cells in the heart?

<p>Generating electrical impulses (A)</p> Signup and view all the answers

Which part of the heart is involved in the sequence of excitation following the SA node?

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

What phase of the Cardiac Cycle involves ventricular ejection?

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

Which factor plays a key role in determining Stroke Volume according to Frank-Starling Law of the heart?

<p>Length of muscle fibers (B)</p> Signup and view all the answers

What effect does sympathetic control have on the heart's permeability to Na+ and Ca2+?

<p>Increases permeability to Na+ and Ca2+ (B)</p> Signup and view all the answers

Which structure is primarily responsible for the fetal adaptation known as Ductus Arteriosus?

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

What cardiac problem is characterized by multiple myocardial infarctions?

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

Which neurotransmitter is involved in parasympathetic control of heart rate?

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

What does EDV-ESV represent in terms of cardiac physiology?

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

What chamber forms the Bulbis cordis during embryology of the heart?

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

What serves as the communication link for the heart to transport hormones and proteins?

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

Which part of the heart is responsible for the spontaneous depolarization of the heart muscle cells?

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

Where can angina pectoris occur in the heart?

<p>Anterior interventricular artery (D)</p> Signup and view all the answers

Which layer of the heart consists of branched and striated cells?

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

What is the function of chordae tendonae in the heart?

<p>Anchoring atrioventricular valves to prevent backflow of blood (A)</p> Signup and view all the answers

Which artery supplies blood to the anterior part of the heart's septum and walls?

<p>Anterior interventricular artery (A)</p> Signup and view all the answers

What is the main function of the serous pericardium layers in protecting the heart?

<p>Providing a lubricated surface to reduce friction during heartbeats (B)</p> Signup and view all the answers

Which structure in the heart is responsible for preventing the backflow of blood from ventricles to atria?

<p>Chordae tendonae (D)</p> Signup and view all the answers

Which layer of the blood vessel is responsible for vasoconstriction and vasodilation?

<p>Tunica media (B)</p> Signup and view all the answers

In blood vessels, which structure contains collagen fibers and vasa vasorum?

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

What type of capillaries have larger fenestrations allowing for rapid exchange?

<p>Sinusoid capillaries (D)</p> Signup and view all the answers

Which type of artery is also known as distributing arteries?

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

What is the function of venules in the circulatory system?

<p>Conduct blood away from tissues to the heart (C)</p> Signup and view all the answers

Total Peripheral Resistance (TPR) in circulation is directly proportional to which factor?

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

What factor determines Blood Flow in the circulatory system?

<p>$∆𝑃$ (Pressure difference) (D)</p> Signup and view all the answers

Which type of blood vessel has valves to prevent backflow of blood?

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

Which factor plays a critical role in determining Mean Arterial Pressure (MAP)?

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

What is the primary mechanism through which arteriolar vasodilation contributes to regulating blood pressure?

<p>Reduced peripheral resistance (C)</p> Signup and view all the answers

Which hormone is associated with long-term regulation of blood pressure?

<p>Atrial Natriuretic Peptide (ANP) (A)</p> Signup and view all the answers

What is the primary cause of primary (or essential) Hypertension according to the given text?

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

In the context of arterial blood pressure, which factor directly contributes to maintaining homeostasis by decreasing output from the vasomotor center?

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

Which center in the Cardiovascular Center is responsible for inhibiting heart rate?

<p>Cardioinhibitory center (B)</p> Signup and view all the answers

What is the primary function of Atrial Natriuretic Peptide (ANP) in relation to blood pressure regulation?

<p>Decreasing blood volume (A)</p> Signup and view all the answers

What is the main cause of Secondary Hypertension as outlined in the provided text?

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

What is a possible symptom of Orthostatic hypotension?

<p>Dizziness upon standing up (C)</p> Signup and view all the answers

In Circulatory Shock, which type is characterized by an allergic reaction?

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

Which process describes the movement of lipid soluble substances across capillaries?

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

What is the primary function of Interstitial fluid osmotic pressure in capillary exchange?

<p>Reabsorption of fluid (A)</p> Signup and view all the answers

What does the term 'Coronary' refer to in medical terminology?

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

What word describes inflammation of an artery?

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

What is the meaning of 'Angina Pectoris' based on its Latin roots?

<p>'Chest pain' (A)</p> Signup and view all the answers

'Embolus' can be distinguished from 'Thrombus' based on:

<p>'Embolus' travels through the bloodstream (D)</p> Signup and view all the answers

'Valvuloplasty' typically involves:

<p>'Surgical repair or replacement of heart valves' (D)</p> Signup and view all the answers

Where are Peyer’s Patches located?

<p>In the small intestine (C)</p> Signup and view all the answers

What is the primary function of the cysterna chyli?

<p>To drain most of the body's lymph (D)</p> Signup and view all the answers

What is the main role of the thymus gland in the lymphatic system?

<p>Produce T cells (D)</p> Signup and view all the answers

Which lymphatic organ serves as a site for lymphocyte proliferation?

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

What differentiates Lymphatic Capillaries from blood capillaries?

<p>Higher permeability (B)</p> Signup and view all the answers

In the lymphatic system, what is the function of Lymphatic Trunks?

<p>Collect lymph from various regions of the body (D)</p> Signup and view all the answers

What is the primary function of MALT in the lymphatic system?

<p>Protect mucosal surfaces from pathogens (D)</p> Signup and view all the answers

What is the role of the Thoracic Duct in the lymphatic system?

<p>Drain most of the body's lymph into the venous blood supply (B)</p> Signup and view all the answers

What are the primary functions of the lymphatic system?

<p>Draining interstitial fluid, transporting dietary lipids, defense against viruses and bacteria</p> Signup and view all the answers

Describe the anatomy of lymphatic capillaries.

<p>Blind end vessels, highly permeable, overlapping endothelial cells, anchoring filament</p> Signup and view all the answers

What are the functions of lymphatic trunks in the lymphatic system?

<p>Lumbar trunk, intestinal trunk, subclavian trunk, jugular trunk, bronchomediastinal trunk</p> Signup and view all the answers

Explain the role of the thoracic duct in the lymphatic system.

<p>It drains most of the body's lymph, returning it to the bloodstream.</p> Signup and view all the answers

What are the primary lymphatic organs and their functions?

<p>Thymus gland (site of T cell maturation), spleen (storage of blood, lymphocyte proliferation)</p> Signup and view all the answers

List the components of MALT in the lymphatic system.

<p>Tonsils, Peyer's Patches, Appendix</p> Signup and view all the answers

What is the main function of lymph nodes?

<p>Filtering lymph, containing immune cells</p> Signup and view all the answers

Explain the formation and flow of lymph in the lymphatic system.

<p>Formation: 3L/day with proteins, Flow: Returns to venous blood via muscle and respiratory pumps</p> Signup and view all the answers

What are the four types of imbalances in blood pressure mentioned in the text?

<p>Hypotension, Orthostatic hypotension, Chronic Hypotension, Acute Hypotension</p> Signup and view all the answers

List the three types of shock under vascular shock.

<p>Anaphylactic shock, Neurogenic shock, Septic shock</p> Signup and view all the answers

What are the two movements of molecules mentioned under Capillary Exchange?

<p>Diffusion, Vesicular transport</p> Signup and view all the answers

Identify the two types of pressures mentioned under Capillary Exchange.

<p>Hydrostatic Pressure, Colloid Osmotic Pressure</p> Signup and view all the answers

What does the term 'Angina Pectoris' mean based on its Latin roots?

<p>Angina - to choke; Pectoris - of the chest</p> Signup and view all the answers

Define 'Arteritis'.

<p>Inflammation of an artery</p> Signup and view all the answers

Explain the difference between Embolus and Thrombus.

<p>Embolus is a moving blood clot; Thrombus is a stationary blood clot</p> Signup and view all the answers

What is the meaning of 'Phlebitis'?

<p>Inflammation of a vein</p> Signup and view all the answers

What is the main function of the Sarcoplasmic Reticulum in muscle cells?

<p>Storage and release of calcium ions</p> Signup and view all the answers

Where are Peyer’s Patches located in the body?

<p>Intestines (specifically in the ileum)</p> Signup and view all the answers

Explain how the Frank-Starling Law of the heart is related to the length of muscle fibers.

<p>The Frank-Starling Law states that the force of contraction is directly proportional to the initial length of the muscle fibers before contraction. Therefore, longer muscle fibers (increased preload) lead to a more forceful contraction.</p> Signup and view all the answers

Describe the impact of increased contractility on stroke volume.

<p>Increased contractility results in a stronger force of contraction, leading to an increase in stroke volume.</p> Signup and view all the answers

How does sympathetic control influence the heart's permeability to Na+ and Ca2+?

<p>Sympathetic control, through catecholamines acting on β1-adrenergic receptors, increases the permeability of the heart to Na+ and Ca2+ ions.</p> Signup and view all the answers

Explain the role of the Bulbis cordis during the embryology of the heart.

<p>The Bulbis cordis is a structure that eventually forms the right ventricle of the heart during embryonic development.</p> Signup and view all the answers

What adaptations does the fetal heart undergo to optimize oxygen delivery?

<p>The fetal heart uses adaptations such as the presence of umbilical arteries and vein, the Foramen Ovale, and the Ductus Arteriosus to ensure efficient oxygen delivery.</p> Signup and view all the answers

What are the clinical manifestations of Congestive Heart Failure?

<p>Congestive Heart Failure can present with symptoms such as coronary atherosclerosis, high blood pressure, multiple myocardial infarctions, and dilated cardiomyopathy.</p> Signup and view all the answers

Explain the mechanisms of Tachycardia and Bradycardia.

<p>Tachycardia is characterized by an abnormally fast heart rate, while Bradycardia is characterized by an unusually slow heart rate.</p> Signup and view all the answers

How does the concept of compliance relate to the cardiac system?

<p>In the context of the heart, compliance refers to its ability to stretch and expand to accommodate blood volume during diastole.</p> Signup and view all the answers

What is the Cardiac Output formula, and how is it calculated?

<p>Cardiac Output (CO) is calculated by multiplying Heart Rate (HR) by Stroke Volume (SV). CO = HR x SV.</p> Signup and view all the answers

Discuss the role of the Endocardial tubes in the embryology of the heart.

<p>The Endocardial tubes give rise to the four chambers of the heart during embryonic development.</p> Signup and view all the answers

The left coronary artery branches into the anterior interventricular artery and the _______ artery.

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

Cardiac myocytes are characterized by being _______ and striated.

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

The pacemaker cells in the heart are known for their ability to spontaneously depolarize, a process called _______.

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

The fibrous pericardium and the serous pericardium (composed of parietal and _______ layers) protect the heart.

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

The great cardiac vein, middle cardiac vein, and small cardiac vein are examples of _______ veins in the heart.

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

Sarcoplasmic reticulum stores ______

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

Extracellular calcium triggers the release of calcium from the ______

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

Slow calcium channels allow for the entry of 10-20% of extracellular ______

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

80-90% calcium comes from the ______

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

Atrial depolarization is part of the ______

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

Isovolumetric ventricular relaxation occurs during the _______ phase of the Cardiac Cycle

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

_______ volume is the volume of blood in the ventricle at the end of diastole

<p>End Diastolic</p> Signup and view all the answers

_______ law of the heart describes the relationship between preload and stroke volume

<p>Frank-Starling</p> Signup and view all the answers

_______ control leads to increased heart rate and permeability to Na+ and Ca2+

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

_______ arteries and vein are part of the fetal heart adaptations

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

Lymphatic capillaries are highly ________

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

The thoracic duct drains most of the ________

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

The thymus gland contains ________ lobes

<p>2</p> Signup and view all the answers

The spleen is a storage site for ________

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

Peyer's Patches are collections of ________

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

The primary function of the white pulp in the spleen is related to ________ proliferation

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

The lymph nodes receive lymph through ________ lymph vessels

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

The tonsils include Palatine, Lingual, Pharyngeal, and Tubal ________

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

_______ are blood vessels that are responsible for vasoconstriction and vasodilation.

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

_______ law of the heart describes the relationship between preload and stroke volume

<p>Frank-Starling</p> Signup and view all the answers

In capillary exchange, molecules move through capillary walls via _______ and transcytosis.

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

Vessel radius is _______ proportional to resistance.

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

The _______ receives lymph through lymph vessels

<p>lymph nodes</p> Signup and view all the answers

_______ volume is the volume of blood in the ventricle at the end of diastole

<p>End-diastolic</p> Signup and view all the answers

_______ are the smallest blood vessels where gas exchange occurs.

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

Total Peripheral Resistance (TPR) is associated with resistance in the _______ circulation.

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

_______ pressure is pulsatile

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

_______ is the main cause of Secondary Hypertension as outlined in the provided text

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

_______ Shock results from blood or fluid loss

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

_______ capillary pressure is responsible for pushing fluids out of the capillaries

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

_______ shock includes anaphylactic shock, neurogenic shock, and septic shock

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

_______ refers to the process of circular movement in the cardiovascular system

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

_______ shock is characterized by weak pulse and vasoconstriction

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