What factors stimulate venoconstriction?

Q: What are the effects of exercise on the myocardium?

A: The muscles of the heart (cardiac muscles) is called the myocardium. It one of the three types of…

Q: What are the mechanisms that assist in returning venous blood to the heart?

A: The most important transport liquid in the human body is blood. This is circulated from heart to…

Q: What is the ratio of the duration of systole to diastole?

A: The cardiac cycle is a cycle of the human heart's activity from the start of one heartbeat to the…

Q: How does vasoconstriction help increase the coretemperature of the body?

A: The body tightly regulates the body temperature through a process called thermoregulation, in which…

Q: What is the vicious cycle of heart failure with preserved ejection fraction?

A: Heart failure with preserved ejection fraction or HFpEF is also known commonly as diastolic HF or…

Q: What is the change in intraventricular pressure between the time the first heart sound begins and…

A: The circulatory system is one of the most essential systems in the body. The function of the…

Q: What factors regulate heart rate during exercise? Stroke volume?

A: The cardiovascular system comprises the heart, blood vessels, and lungs. It is also named the…

Q: What compensatory measures does the body employ in an attempt to restore cardiac output?

A: The circulatory system is one of the most essential systems in the body. The function of the…

Q: How does vasoconstriction in the skin and viscera resultin increased venous return to the heart?

A: The constriction of the blood vessels is known as vasoconstriction. It leads to the increased blood…

Q: What happens to the heart in the first 24 hours following a myocardial infarction (heart attack)?

A: Myocardial infarction can be basically due to the permanent damage to the heart muscles because of…

Q: What causes the pacemaker cells of the SA node to trigger an action potential?

A: The heart is made up of cardiac muscle. It contains a network of specialized cardiac muscle fibres…

Q: Why would blocking the action of a vasoconstriction lower blood pressure?

A: Circulatory system is a type of body system in which circulation of body fluids occur and…

Q: What effects does the parasympathetic nervous system have on cardiac output?

A: The cardiovascular system plays the part in conveying the blood through vessels to and from all…

Q: What is the inherent rate of automaticity at the AV junction?

A: The Heart is a vital part of the body, it supplies the blood to the various body part, organs. It is…

Q: How does the barorecptor reflex explain the decrease in heart rate during carotid sinus massage?

A: The carotid sinus and aortic arch contain baroreceptors, which are mechanoreceptors. Their job is to…

Q: What effect does hypocalcemia have on the contractile force developed by cardiac muscle?

A: Calcium plays an important role in the activity of muscles. It is released in the muscles from the…

Q: What pressure difference between the ventricle and the atrium causes theatrioventricular valve to…

A: The cardiac cycle refers to the sequences of events that occur and repeat with every heartbeat. It…

Q: How is the autonomic nervous system involved in the regulation of arterial pressure?

A: Answer: Introduction: The autonomic nervous system includes two portions the sympathetic and…

Q: What forces drive the venous return to the heart?

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

Q: Why is the intrapleural pressure normally lower than intrapulmonary pressure? What is the function…

A: Intrapleural pressure is the pressure inside the pleural cavity.

Q: What are the effects of hypercapnia and acidosis on the heart rate?

A: Hypercapnia refers to the accumulation of carbon dioxide in the blood. It occurs due to…

Q: describe the following body transports systems: Active (Primary) Passive (diffusion- simple,…

A: The transportation system is necessary because every cell keeps maintaining homeostasis inside the…

Q: What role does the AV nodal delay play in normal cardiac function?

A: The heart is the mechanical pump that is run by electrical impulses and is responsible for receiving…

Q: What activity in the heart is associated with the first heart sound, and what is associated with the…

A: The cardiac cycle includes atrial systole, atrial diastole, ventricular systole and ventricular…

Q: How do the compensatory responses triggered in heart failure work to restore cardiac output, and how…

A: Heart failure, the final stage of many cardiac disorders, occurs when the heart cannot maintain…

Q: What effect does increased venous return have on stroke volume?

A: The influx of blood back to the heart is known as venous return (VR). Since the cardiovascular…

Q: What areas of the heart are deprived of blood when there is a blockage in the posterior…

A: Posterior Interventricular artery is a coronary artery, which is also known as the Posterior…

Q: How does venous circulation help maintain blood pressure when hemorrhaging causes blood loss?

A: The circulatory system of the human body is made up of a closed circuit of arteries and veins. The…

Q: What part of the heart controls the heartrate? What is vagal tone?

A: The circulatory system is also commonly known as the cardiovascular system which is a network of…

Q: how does the delay of the impulse at the atrioventricular node contrribute to cardiac function?

A: The AV node serves as an electrical relay station, slowing the electrical current sent by the…

Q: How does heart failure with systolic dysfunction differ from heart failure with preserved systolic…

A: In general, heart failure is a condition that occurs when your heart isn’t pumping efficiently…