In a healthy young adult, what happens to cardiacoutput when heart rate increases above 160 bpm?a. It increases.b. It decreases.c. It remains constant.d. There is no way to predict

Q: Describe how the pressure in the left ventricle and in the systemic arteries varies during the…

A: The heart is a muscular organ that is divided into the left and right sides to prevent the mixing of…

Q: The second heart sound ("dub") results from vibrations generated by the A. closing of the AV valves…

A: A normal heartbeat consists of two sounds- LUB and DUB. These sounds often occur as pairs in a…

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…

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A: Blood circulates under pressure through the vasculature. Following vascular injury, escaping blood…

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: Based on your data, how was your heart rate different during the first and last 10 seconds…

A: Heart rate is the pounding of the heart in one minute. Normal heart rate is -60 to 100beats /…

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: In a single cardiac cycle, if EDV increases, what do you predict about the upcoming SV? Will SV…

A: In a single cardiac cycle, if EDV the upcoming SV will also increase.  EDV is directly proportional…

Q: The heart chamber that receives oxygenated blood from the lungs of animals with a double circulation…

A: Human heart is the Center for regulating blood across the body. It is located within the thoracic…

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 these is an incorrect statement concerning the heartbeat?a. The atria contract at the same…

A: The heartbeat has two parts, systole when the heart contracts and pumps blood and diastole when the…

Q: Predict the significance of slow blood flow in the capillaries

A: The blood vessels are characterized by the presence of a single endothelial layer, diameter 5 to 10…

Q: a)How is one-way flow through the heart achieved and What are the stages of the cardiac cycle and…

A: The cardiac cycle is a function of the human heart from the beginning of the heartbeat to the…

Q: a. Ventricular diastole b. Throughout the cardiac cycle c. Between cardiac cycles  d. Ventricular…

A: Heart It is the main component of the circulatory system. It pumps the blood to various parts of the…

Q: heart rate before and after performing an exercise? Why does your heart rate change before and after…

A: Exercises results in both physiological and psychological changes.

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: Acclimatization at high altitude would include a.increased in contractility of heart and increased…

A: Acclimatization, also known as acclimation or acclimatisation, is the process by which an individual…

Q: Describe why your heart rate increases with exercise. What would happen if your heart did not beat…

A: The heart is a muscular organ that pumps blood throughout the body. It is located in the middle…

Q: The lining of the heart chambers is called the __________.   A endocardium   B myocardium   C…

A: The heart is the muscular organ that pumps blood throughout the body. It is made of cardiac muscle.…

Q: Which is not true about our heart A. ventricular systole squeezes blood to the lungs and the body B.…

A: Heart is a muscular organ that helps puno blood to different body organs. It has four chambers,…

Q: There are a number of drugs that are prescribed to patients with heart failure in an effort to…

A: Inotropic agents are those that modify the force of contraction of the heart. They can be of two…

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: Which of the following cardiac tissues has the most rapid conduction velocity? A)The AV node. B)…

A: Purkinje fibre situated in both ventricle myocardium

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: How would the left ventricle of a patient who had had high blood pressure for many years differ from…

A: Answer: Introduction: Left ventricular hypertrophy is expansion and thickening means hypertrophy of…

Q: The effective-refractory period present during Phase 2 of the action potential of ventricular…

A: A transient shift in membrane permeability across the cellular membrane of cardiac cells is known as…

Q: Calculate the power generated by the right ventricle during (a) restful state; blood flow 5 L/min,…

A: The heart contracts to circulate blood across the body and into the lungs. The left chamber…

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: During the cardiac cycle, when would you expect to hear the second heart sound? O a) After ejection…

A: The timeframe that starts with compression of the atria and closures with ventricular unwinding is…

Q: The heart’s internal pacemaker beats by: a. an internal implant that sends an electrical impulse…

A: The heart is a muscular organ in numerous animals, which siphons blood through the veins of the…

Q: a) Referring to the Figure , which part of the heart's electrical conduction is known as the…

A: A pacemaker is a little gadget that is put under the skin in your chest to help control your pulse.…

Q: If you consider the anterior interventricular artery if a thrombus forms in the artery, which area…

A: The heart refers to the organ that pumps blood all over the body tissue. The circulatory system…

Q: In conditioned athletes, the resting Heart Rate is generally much lower than in non-athletes. Why?…

A: Option - d is correct

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: What is the consequence of the prolonged plateau of depolarization in ventricular myocytes?   a-it…

A: the consequence of the prolonged plateau of depolarization in ventricular myocytes.

Q: Write a note on “Regulation of cardiac activity”?

A: The human heart is myogenic as it generates its own electrochemical impulse through the activity of…

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: Double-loop circulatory systems are found in adult amphibians, reptiles, birds, and mammals.…

A: The double-circulatory system passes the blood twice through the heart, per circuit. The…

Q: Give answer from image shown.

A: The cardiac physiology is defined as the study of the function of the heart that is healthy and…

Q: In which of the heart chambers would deoxygenated blood be found? A)left atrium and left ventricle…

A: Blood Circulation in Circulatory System: Through two large veins (inferior and superior vena cava)…

Q: f the sinoatrial node stopped generating action potentials the heart would _____.   A stop beating…

A: The heartbeat starts with an impulse generated by the sinoatrial node (SA node) also known as the…

Q: Develop a model for the flow rate (amount per unit time) of blood through a given blood vessel.…

A: Factors That Affect Rate There are four main factors that can affect the reaction rate of a chemical…