What normally serves as the pacemaker of the entire heart? O Purkinje fiber system O atrioventricular (AV) bundle O atrioventricular (AV) node O sinoatrial (SA) node

Q: Generates electrical impulse that sets rhythm to the heart; the primary pacemaker of the heart. SA…

A: Heart has conductive system which generates and transfer the electrical impulses.

Q: The SA node of the heart creates a pace that is faster than does not generate a pace O the same as O…

A: What is the SA node - The SA (sinoatrial) node, also known as the sinus node, represents a…

Q: Heart Anatomy The human heart has _# chambers. The top chambers TYPE are called and the bottom are…

A: To answer the blanks that are missed. The paragraph talks about heart anatomy.

Q: The lower chambers of the heart are the: A) aortasB) capillariesC) ventriclesD) atriums

A: The organ system is the group of organs that functions together to maintain the biological system of…

Q: The average pressure in the systemic arteries during an entire cardiac cycle is known as: O…

A: The cardiac cycle is defined as the complete cycle from contraction to relaxation of heart muscles.…

Q: The period of ventricular contraction = O phase O of pacemaker action potential O phase 2 of…

A: Isovolumetric contractions occurs in The early  stage of heart contractions. The period of…

Q: The P wave on an electrocardiogram (ECG) represents the depolarization of cells in the: O…

A: Heart is an organ present in the circulatory system. It is responsible for pumping of blood to the…

Q: Venous blood from the heart wall enters the right atriumthrough thea. superior vena cava.b. coronary…

A: The type of blood that is in deoxygenated condition and moves from the peripheral blood to reach the…

Q: Autorhythmic cells in the SA node intrinsically fire at a rate of - 90 action potentials per minute.…

A: While performing exercise, the cardiovascular apparatus performs two major tasks:- 1. Provides…

Q: the amount of blood pumped by the ventricucles each is referred to as

A: The heart of a human being consists of 4 chambers with two on the right side and two on the left…

Q: Which structure is labelled "F"? Aorta Cardiac muscle Inferior vena cava Left atrium Left ventricle…

A: Heart is important organ of body which helps I. Pumping of blood across all the tissues and cells…

Q: The heart is resting during Select one: ventricular systole. the ejection period. ventricular…

A: Cardiac cycle The cardiac events that occur from the beginning of one heart beat to beginning of…

Q: The cells of the myocardium behave as a single, coordinated unit called a Select one: О а. cardiac…

A: Cardiovascular system plays a vital role in the transport/supply of nutrients, gases and removal of…

Q: An increase in end-diastolic volume always causes an increase in stroke volume in a normal heart…

A: Stroke volume It is the amount of blood that is forced out from the ventricle per cardiac cycle. It…

Q: Blood pressure is lowest in O left ventricle. O capillaries. veins. arteries. QUESTION 23 The…

A: The circulation of the blood in the body is controlled by the pumping of the heart. Heart makes the…

Q: Vessels that carry blood away from the heart are called * O Vein O Artery O Vapillary

A: The heart is a muscular organ the size of a fist that is found just behind and just to the left of…

Q: What is the correct sequence for flow of blood in the heart? o Superior vena cava → right ventricle…

A: The circulatory system delivers oxygen and nutrients to cells and takes away wastes. The heart pumps…

Q: Why is the left ventricle of the heart thicker than the right ventricle

A: Heart pumps blood to the body. Human heart has four chambers, 2 atria and 2 ventricles. Both the…

Q: On an ECG erratic waves indicates. and is associated with O ventricular fibrillation, second-degree…

A: A human heart is a four-chambered muscular organ that is used to pump blood to different parts of…

Q: John is your 68-year old neighbor who was recently told by his doctor that his heart’s main…

A: Cardiovascular system consists of the heart, blood vessels. The main function of the heart is to…

Q: High pressured blood in the ventricles: O forces the AV valves open. O forces the semilunar valves…

A: The heart is the blood pumping organ of animals. It is composed of 4 chambers. The 2 upper chambers…

Q: Feeding the heart with oxygen, the heart gets blood from the to the arteries. O Aortic arch/coronary…

A: The heart is a strong organ about the size of a fist, found simply behind and marginally left of the…

Q: Identify the bundle of His O under the left ventricles O between the right and left ventricles of…

A: "The bundle of His" is an important part of the electrical conduction system of the heart. It…

Q: In the lab, symphatetic stimulation of the heart will decrease heart rate O increase heart rate O…

A: The heart's function is to contract and pump oxygenated blood throughout the body while deoxygenated…

Q: The main pacemaker area of the heart is the: O Bundle branches O AV node SA node Purkinje fibers

A: Given: The heart is a muscular organ which is as big as our fist.It is located between the lungs in…

Q: During contraction of heart, what prevents backflow of blood?a) Thin walls of atriab) Thick muscular…

A: The heart is the muscular organ of the circulatory system of the vertebrates. The apes and mammals,…

Q: Inside the heart: Identiity and puimo (mitral valve), right atrlum, left atrlum, right ventricle,…

A: The heart is a vital organ of the body. Its size is equal to a fist. It is a muscular organ whose…

Q: Which component of the heart conduction systemwould have the slowest rate of firing?a.…

A: Step 1 A cardiac conduction system is an array of functional and specialized cardiac muscle cells,…

Q: All the blood that passes through the aorta, except the blood that flowsinto the coronary vessels,…

A: Resistance is a force that opposes the flow of a blood.

Q: Saved He nich of the following statements is true about the regulation of the heart by the autonomic…

A: Ans. The ture statement is parasympathetic nerves release acetylcholine at cholinergic nerve endings…

Q: What does the QRS complex in the EKG represent and what occurs immediately after? Select one: O a.…

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

Q: the heart during a single complete are True/False. The duration of systole exceeds that o

A: The cardiac cycle is defined as the period between the start of one heartbeat to the start of the…

Q: complete blockage of this coronary artery results and sudden death because of the large amount of…

A: The circulatory system consists of three systems that work together; the heart (cardiovascular),…

Q: Which of the following statements about the cardiovascular system is TRUE? (select multiple) o The…

A: Question - Which of the following statements about the cardiovascular system is TRUE? (select…

Q: From which chamber of the heart does blood leave to go to the body: O Left atrium O Both left…

A: Please follow step 2 for detailed explanation.

Q: Extraodinary contraction of the heart or its certain part is called: O a. extrasystole O b.…

A: Answer given below

Q: why is it important for a human heart to develop early and benign functioning

A: The fetal heart is the first developmental and functional organ.

Q: What is the significance of atrio-ventricular node and atrio-ventricular bundlein the functioning of…

A: The heart is the most important organ in the body. It is made up of several different types of…

Q: What valve prevents the backflow of blood from the right ventricle into the right atrium? right…

A: One of the most essential systems in the human body is the circulatory system. It is made up of the…

Q: The conduction system of the heart: 1. SA node 2. AV node 3. 4. __ 5. -

A: The heartbeat is controlled by a set of nodes, cells, and impulses known as the cardiac conduction…

Q: Blood enters into the heart because of muscles of ventricles contract O ventricles relax atria…

A: The cardiovascular system is often known as the blood-vascular system or simply the circulatory…

Q: Place these events in the correct order as they occur in the cardiac cycle: 1. Contraction of the…

A: Cardiac cycle Cardiac cycle is a term used to describe the relaxation and contraction that occur,…

Q: upper chambers

A: Answer: The two upper chambers of the heart are called the atria. They are the chambers that fill…

Q: A membrane called the _____ covers the heart. A membrane superficial to this membrane is the _____.…

A: The pericardium is the thin sac-like covering of the heart. It lubricates the heart and is required…

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: A heart showing no electrical activity (i.e. a flat line on the ECG) is in O heart block O…

A: We all know that if the heart is beating then it will show its electrical activity in the ECG.  But…

Q: The first heart sound (S1) is caused by: O The aortic and pulmonary valves closing as ventricular…

A: heart is the organ which helps in pumping blood to all parts of the body .it produce sounds which is…

Q: The vein that collects most of the venous blood from below the diaphra O superior vena cava O…

A: Heart is situated in the thoracic cavity;present between two lungs; and is slightly tilted towards…

Q: Blood is carried to capillaries in the myocardium by way of:     coronary arteries     the…

A: The myocardium is a thick middle layer of the cardiac wall that is composed of contracting muscle…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.