a. Ventricular diastole b. Throughout the cardiac cycle c. Between cardiac cycles  d. Ventricular systole

Q: Description 1. Microscopic blood vessels with thin, porous walls; site of gas exchange between…

A: microscopic blood vessels with small porous wall for exchange of gases between the blood and the…

Q: How is blood prevented from backflowing from the pulmonary trunk into the right ventricle? a.…

A: As the heart pumps blood, a definite series of valves open and close tightly. These valves ensure…

Q: During diastole: A. the AV-valves are open and the aortic & pulmonary arterial valves are closed. B.…

A: Systole and diastole are part of cardiac cycle. Systole means contraction of heart and diastole…

Q: The atria contract duringa. the first heart sound.b. the second heart sound.c. the QRS complex.d.…

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: An ECG measures a. changes in electrical potential during the cardiac cycle. b. Ca2+…

A: Introduction: ECG or electrocardiogram is a machine that helps analyse the condition of the heart.…

Q: The part of the heart that relaxes when filling up with blood before ejection to the pulmonary…

A: Heart is the most important organ that pumps blood. It is divided into four compartments; right and…

Q: The vessels that carry oxygen to the myocardium are called __________.   A pulmonary arteries   B…

A: Blood is the body fluid that flows in tube-like structures known as vessels and functions in the…

Q: The trabeculae carneae are located in the __________.   A epicardium   B ventricles   C atrium…

A: Step 1 The trabeculae carneae or columnae carneae are either rounded or irregular muscular columns…

Q: The valves which allow blood to flow from the ventricles into the arteries and not in the opposite…

A: The valves are the muscular flap like structures that are present between the two chambers of the…

Q: The pulse pressure is a measure of a. the number of heartbeats per minute. b. the sum of the…

A: Blood pressure records two measurements: systolic pressure and diastolic pressure wherein systolic…

Q: In a healthy young adult, what happens to cardiacoutput when heart rate increases above 160 bpm?a.…

A: Cardiac output is also known as heart output. It describes the amount of blood being pumped by the…

Q: During the systolic phase of the cardiac cycle, the heart is ________. a. contracting b. relaxing c.…

A: The heart is a pumping organ that provisions or supplies all tissues and organs of the body with…

Q: Which of the following is NOT a population of pacemaker cells in the heart? a. papillary muscles b.…

A: D) purkinje fibre system

Q: The ____________ follows the coronary sulcus around the heart and supplies blood to the left atrium…

A: The cardiovascular system is also known as the circulatory system that allows the blood flow…

Q: An area of dead myocardial tissue is called: A) an infarct B) stenosis C) an induration D)…

A: Answer is A.) an infarct.

Q: nodal delay a. maintains cardiac output by allowing enough ventricular filling. b. prevents…

A: The AV node is a highly specialized conducting tissue that slows the impulse conduction considerably…

Q: To get from the right atrium to the right ventricle, blood flows througha. the pulmonary valve.b.…

A: To get from the right atrium to the right ventricle, blood flows through the right AV valve or…

Q: Blood flow in the coronary circulationa. increases during systole.b.increases during…

A: Coronary circulation is the circulation of blood in the blood vessels which supply blood to the…

Q: corresponds to: A. Right ventricle B. Left Atrium  C. Right Atrium D. Left ventricle

A: Left atrium is the upper right chamber of heart .

Q: The function of structure X is to Select one: a. act as the pacemaker of the heart. b. initiate the…

A: Heart is located in the chest cavity and derived from mesodermal tissue. Heart is surrounded and…

Q: ____ carry blood away from the heart and ____ carry blood toward the heart. a. Veins . . . arteries…

A: Step 1 Blood vessels are tubes carrying blood, associated oxygen, nutrients, water, as well as…

Q: Blood flows directly from the left atrium to_____ . a. the aorta c. the right atrium b. the left…

A: The heart has four chambers in human beings. They are the two upper atria and two lower ventricles.…

Q: A) Name the blood vessel and B) Identify the valve A B A) Aorta; B) Aortic Semilunar valve A)…

A: Heart situated in the left thoracic cavity in the cardiac notch.

Q: After passing through the inferior vena cava blood passes through the A coronary sinus B posterior…

A: The cardiovascular system, also known as the circulatory system, is made up of a blood pumping…

Q: Blood flows through the vessels references in the above image during:

A: Heart  It is the main blood pumping organ of the body as it is formed of Cardiac muscles. There are…

Q: The normal pacemaker of the heart is the ______.   A sinoatrial node   B left atrium   C…

A: Heart is an important organ that pumps blood. Heart is myogenic in nature meaning it is capable of…

Q: Select the correct one, Which of the following would not increase Cardiac Output? A. increase blood…

A: We know that, The amount of blood pumped by the ventricles in 1 minute is measured in terms of…

Q: Blood leaves the right ventricle through the ______.   A pulmonary trunk   B right atrium   C…

A: The human heart is situated in the middle of the thoracic cavity in a space called the mediastinum.…

Q: he inferior vena cava brings blood from the lower regions of the body and empties into the…

A: the inferior vena cava is the largest vein and it carries deoxygenated blood from the lower body…

Q: The most common disorder affecting the heart and blood vessels is ? A. arrhythmia B. Hypertension…

A: There are different types of abnormalities found in the function of heart and in the circulation of…

Q: The coronary arteries arise from the __________.   A right atrium   B inferior vena cava   C…

A: The coronary system comprises of arteries, arterioles, capillaries, venules and veins. These…

Q: Which of the following forms of shock occurs as a result of expansion of the vascular compartment?…

A: A shock is a medical condition caused by a sudden drop in blood flow in the body. It can be caused…

Q: When the ventricles contract with more force this causes the _____ volume to be larger and the ____…

A: Ventricles   The two large chambers present towards the bottom of the heart. The main function of…

Q: The blood vessels responsible for variably distributing cardiac output among organs in the body are:…

A: Animal physiology is the systematic study of the supporting features, roles, and processes of…

Q: The onset of Ventricular diastole is associated with: A. the closing of the aortic valve B. the…

A: Human heart is composed of two auricles (atria) and two ventricles. Cardiac cycle consists of…

Q: Myocardial infarction, or a heart attack, results if there is a lack of oxygen and nutrients brought…

A: Myocardial infarction It is commonly referred to as the heart attack , is the sudden death of   part…

Q: Right and Left Ventricular pressures differ during: A. the entire cardiac cycle B. diastole C.…

A: The human heart is 4 chambered that is there are 2 auricle and 2 ventricle. The Diastole is the…

Q: What factors increase the chance of surviving a cardiac arrest?…

A: Cardiac arrest is a sudden loss of blood circulation failing the heart to pump efficiently. The…

Q: Venous blood draining from the heart wall enters the right atrium through the a. coronary sinus. b.…

A: The heart is a muscular organ in most animals that pumps blood via the blood vessels of the…

Q: Why might the increase in heart rate associated with a vigorous exercise program be the cause of his…

A: Cardiac muscles are the muscles that are present in the heart and are principally accountable for…

Q: Which of the following would not increase Cardiac Output? A. increase blood epinephrine…

A: The amount of blood pumped by the ventricles in 1 minute is measured in terms of cardiac output…

Q: At what point is the pressure in the ventricles increasing most rapidly?   A when both sets of…

A: The measurement of the blood pressure in the ventricles of the heart is known as ventricular…

Q: The heart's pacemaker is the O a. atrioventricular node O b. bicuspid node O c. sinoatrial node O d.…

A: A cardiac pacemaker is a medical device that sends electrical impulses to the heart muscle chambers…

Q: time of ventricular repolarization [Choose ] [Choose] time of atrial repolarization A time of…

A: ECG means electrical activity of heart represented in a graphical form. Electrocardiography is a…

Q: The first heart sound is caused by turbulent blood flow which occurs as close(s). A only mitral…

A: Heart sound During each cardiac cycle two prominent sounds are produced. These are "Lubb" and "Dub"…