Standing for a prolonged period of time can cause ... a. Decline in venous return  b. A drop in cardiac output  c. A drop in mean arterial pressure d. All of these changes can happen from prolonged standing

Q: What happens to preload when there is venousconstriction in the veins?a. It increases.b. It…

A: The heart is a muscular organ in most animals. It pumps blood through the blood vessels of the…

Q: Between 30 and 80 years of age, the cardiac output decreases by about A. 10 percent B. 20 percent C.…

A: Cardiac output is defined as the quantity of blood pumped out of the heart through the circulatory…

Q: The ascending aorta and pulmonary trunk develop from the embryonic:- a. bulbus cordis only. b.…

A: Ascending aorta refers to the part of the aorta that begins at the upper region of the left…

Q: The two factors that assist the relatively low venous pressures in propelling blood toward the heart…

A: The circulatory system in humans has the heart, blood vessels- arteries and veins, etc. mainly. The…

Q: Cardiac output cannot increase indefinitely because (a) available filling time becomes shorter as…

A: The circulatory system is a blood vessels network that delivers blood to body's every part. Blood…

Q: Which of these organs is able to tolerate the greatest reduction in blood flow? a. Brain b. Heart…

A: Blood flows in the body consists of the red blood cells, which contain haemoglobin. The haemoglobin…

Q: When a person engages in strenuous, prolonged exercise, a. blood flow to the kidneys is reduced.b.…

A: Exercise is very important for the body. It proves flexibility in the body, improves the postures,…

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: Which of the following is True?a. Arteriole diameter is controlled by nerves, hormones,and chemicals…

A: The circulatory system is responsible for the transport of nutrients, electrolytes, wastes gases,…

Q: In a person at rest, the largest volume of blood is in______. a. arteries c. veins b. capillaries d.…

A: The blood is circulated throughout the body parts by the circulatory system whose main parts include…

Q: If a vessel were to dilate to twice its previous radius, and if pressure remained constant, blood…

A: Introduction: According to the Frank-Starling law of the heart, the strength of the vascular…

Q: Which of the following is NOT one of the functions of the cardiovascular system? a) To exchange…

A: The cardiovascular system or the circulatory system comprises the heart and the network of blood…

Q: Blood pressure can be significantly affected by (a) cardiac output (b) peripheral resistance (c)…

A: The wall of the arteries experiences a force that is exerted by the blood, this force is called…

Q: (iii) A muscular wall is absent in : A. Capillary B. Venule C. Arteriole D. Vein

A: The correct option is A. Capillary

Q: Which of the following statements is false?a. Only arteries carry oxygenated blood.b. Both arteries…

A: Components of closed circulatory system It consists of heart to pump the blood, blood vessels like’s…

Q: erythropoietin release in the body happens when an individual is at high altitude. It results in a.…

A: Erythropoietin : It is a hormone which is produced predominantly by specialized cells called…

Q: A circulatory pathway in which the blood flows through two capillary beds in series - before it…

A: The circulatory pathways direct proper flow of blood through heart, lungs, and various associated…

Q: The diameter of veins is typically larger than that of arteries,becausea. veins must carry blood at…

A: Open and Closed circulatory systems are the two types of circulatory systems in our body. This…

Q: The T wave represents: a. Depolarization of the ventricles b. Repolarization of the atria c.…

A: ECG (Electrocardiogram) can be outlined as the graph which represents the electrical activity of the…

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: An increase in mean arterial pressure can result froma. an increase in peripheral resistance.b. an…

A: Mean arterial pressure is defined as the average arterial pressure in one cardiac cycle, which…

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: If the systemic blood mass of a person is 2.8 kg, what is the body mass of the person? a.) 200 kg…

A: Blood is the fluid that is used to deliver nutrients and the respiratory gases to all the parts of…

Q: The unpaired arteries supplying blood to the visceral organs include the (a) adrenal, renal, and…

A: Cell is the basic unit of life. Based on the number of cells an organism may be prokaryotic or…

Q: Pulse is a direct measure of(A) blood pressure.(B) stroke volume.(C) cardiac output.(D) heart rate.

A: The pulse of a person is measured by placing one’s finger on the inside wrist of that person. The…

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: You have an older patient who over the years has steady increase in blood pressure due to changes in…

A: Blood Vessel Compliance is a property of blood vessels. It it is the ability of these blood vessels…

Q: Based on the blood pressure readings which of the following is likely to be hypertensive ?__…

A: The heart is a muscular organ that is divided into four chambers: Left auricle, right auricle, left…

Q: Which statement is true? A. All arteries carry oxygen-rich blood. B. All veins carry oxygen-rich…

A: The heart pumps blood and circulates it throughout all the body parts for their functioning. The…

Q: Anytime there is a sustained change in blood pressure (longer than 2-5 minutes) ______ is…

A: Carotid sinus consist of various baroreceptors  Carotid sinus baroreceptors are innervated by sinus…

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: The advantage of having a heart with two atria is that a) oxygenated and deoxygenated blood are…

A: The human heart has 4 chambers :  Left atrium Right atrium Left ventricle Right ventricle The…

Q: An increase in mean blood pressure may be due to? a) an increase in heart rate b) an increase in…

A: During blood flow, blood exerts a force on the blood-carrying vessels. We know the pressure is the…

Q: Velocity of blood flow is the slowest in a. muscular arteries. b. capillaries. c. veins. d. elastic…

A: The circulatory framework, additionally called the cardiovascular framework or the vascular…

Q: Which of the vessels pointed to above corresponds to the thoracic aorta? a. The vessel with the…

A: Aorta It is the thickest blood vessel in the body. It arises from the left Ventricle,ascends and…

Q: Calcium channel blockers are drugs that are given to cause a. an increase in the volume of blood…

A: Introduction: When voltage-gated sodium ion channels open temporarily on a nodal cell, sodium raises…

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 statements is true?a. The longer the vessel, the lower the resistanceand the…

A: Blood is a fluid connective tissue that circulates all over the body delivering nutrients and oxygen…

Q: The presence of __________ stabilizes the wall of arterioles and capillaries.   A gap junctions   B…

A: An arteriole is a very small blood vessel as it has a very small diameter. These arterioles are…