Why might exercising on a very hot day result in fainting?

Q: heart failure occurs when

A: Congestive heart failure is commonly known as heart failure that refers to a condition in which the…

Q: Upward deflection due to ventricular repolarization = P wave O PR interval O QRS complex O Twave

A: Electro Cardiogram ECG is a device that measures the impulse of the heart. It specifically tests the…

Q: Where are the autorhythmic cells located/ List its function?

A: 1. Pacemaker Potential• An Autorhythmic cell has the unique ability to depolarize spontaneously,…

Q: How does the body try to compensate for insufficient cardiac output during shock states?

A: Cardiac output refers to the blood that the heart pumps through both left and right ventricle in a…

Q: What do you mean by mycocardial infarction?

A: A disease is a state of unhealthiness of the physical body, mind and social interaction. A disease…

Q: Pulse pressure is increased by

A: The pulse pressure is the difference between the systolic and diastolic blood pressure. It is…

Q: What causes an increase in heart rate?

A: Heart rate/Heart pulse It is the speed of the heart beat measured by the number of pounding of the…

Q: Does a change in body position from supine to standing cause a change in pulse?

A: The hydrostatic pressure exerted against the walls of blood vessels by blood flow is known as Blood…

Q: What effect does sympathetic stimulation have on the heart?

A: The sympathetic nervous system is responsible for stimulating the vasoconstriction of blood vessels.…

Q: Do minor movements such as sitting and standing affect pulse rate? How long does it take for pulse…

A: Sitting & Standing: [affect pulse rate]             Slight repeated movements and vascular…

Q: Why when standing up may you feel faint?

A: A temporary loss of consciousness lead to a minimized flow of blood to the brain; a swoon: to make…

Q: How would “hardening of the arteries” (arteriosclerosis) affect blood pressure? Why?

A: Introduction: Atherosclerosis and arteriosclerosis are often used interchangeably. They both refer…

Q: A patient is taking a drug that blocks beta-adrenergic receptors. What changes in cardiac function…

A: A drug is a chemical substance that produces a biological effect. When the drug is taken by…

Q: Explain the operation of the carotid sinus reflex and the aortic reflex.

A:

Q: What do tachycardia and bradycardia mean?

A: Bradycardia and Tachycardia are two forms of irregular heart rates or arrhythmias. These arrhythmias…

Q: Why could a choke hold (a tight grip around the neck) cause a person to pass out? What arteries…

A: In the human body, the brain is a complex organ present. The brain is the control center of the…

Q: You have to stand in front of the class to give a report. You are nervous, and your heart is…

A: The Electrocardiogram (ECG) is a record of the myocardial electric changes. It is a graphical…

Q: What do you mean by double circulation?

A: Circulation is a process by which blood along with oxygen and nutrients are supplied to every cells.…

Q: What effect will an increase in parasympathetic activity have on heart rate, force of contraction,…

A: The  Autonomic nervous system (ANS) has two interacting systems: the sympathetic and parasympathetic…

Q: Explain how the baroreceptor reflex helps to compensate for a fall in blood pressure. Why will a…

A: The baroreceptor reflex, propitiated by the autonomic nervous system (ANS) joining the heart and…

Q: Why is the velocity of blood flow faster in arteries and veins than in capillaries?

A: Rate or Velocity of blood flow varies inversely with the total cross sectional area of the blood…

Q: What is a pulse? List the locations on the body where thepulse can easily be detected.

A: Vital signs are the four medical signs that evaluate the functioning of the body whether it is…

Q: A man was rushed to the ER when he complained of a constant pain down his left shoulder. The…

A: The cardiovascular system is primarily composed of the heart, blood, and blood vessels. This system…

Q: A classmate who has been standing still for several hours working on a laboratory experiment…

A: Working on long laboratory experiments can result in fainting and this is very common.

Q: The death of cardiac tissue from lack of blood flow is commonly known as a heart attack, but…

A: Every muscle and tissue of our body needs oxygen for its survival, so as your heart muscles. A heart…

Q: Dehydration causes which type of shock? 1) cardiogenic 2) obstructive 3) hypovolemic 4) distributive

A: The answer is (3)hypovolemic.

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: Effects of posture on venous pressure

A: The position in which someone holds their body when standing or sitting is defined as the posture.…

Q: Why is the Frank-Starling law of the heart important to the understanding of heart failure?

A: Frank starling law is a law that defines the relation between end diastolic volume and stroke…

Q: Using one type of dysrhythmia as an example, explain howcardiac output may be reduced.

A: The clinical condition involving abnormal speed rhythm of the heart refers to dysrhythmia. It is…

Q: Why do implantable defibrillators require far less power on their own than a pacemaker?

A: Pacemaker is known as artificial heart which is incorporated of any problem in functioning of the…

Q: What is the force driving venous return?

A: * Veins are blood vessels which return blood to the heart. * The pressure in these veins is the…

Q: What is congestive heart failure?

A: When the heart gets weak due to coronary artery disease, high blood pressure or narrow arteries,…

Q: what type of individualis likely to have bradycardia at rest?

A: Heart rates can vary from person to person. For adults, a fast heart rate is generally defined as a…

Q: Is the blood in motion or not in motion after an activity?

A: Our blood is carried to different organs by the arteries continuously. The heart pumps the blood…

Q: Introduction about fainting and heat stroke

A: Heatstroke can be defined as a condition where the body temperature is raised to a level where its…

Q: A disturbance in the flow of blood to the brain is a

A: Central nervous system consists of brain and spinal cord. It controls the activity of body.

Q: Why is Sinus bradycardia often normal in athletes?

A: The average heart beat of a human at rest is about 60-100 beats per minute(bpm). Bradycardia is a…

Q: Can the transport through the capillaries in the right foot be affected by an edema? Explain.

A: When excessive fluid builds up and accumulates in the cells or within tissues or in the interstitial…

Q: Sympathetic Qc heart rate Normal Parasympathetic Heart rate Myocardial damage Pra

A: Heart Rate is the important physiologic regulator as determines the circadian rhythm of our heart…

Q: What is Cerebral Blood Flow?

A: Nervous system comprises organs that are made up of neurons (nerve cells). The nervous system is…

Q: Low pH, if detected in the aortic arch, will cause the medulla oblongata to activate the

A: Sympathetic nervous system and parasympathetic nervous system are division of autonomic nervous…

Q: Palpate main arterial pulses

A: The arterial pulse is the rapid extension of an artery caused by the expulsion of blood into the…