45. Which of the following is/are true concerning the opening and closing of thecardiac valves?   A. valves operate according to the pressures on either side of the valve B. valve operation is constantly being controlled by the medulla oblongata C. valve operation is determined directly by the cardiac action potential (electrical currents control the opening and closing of the valves.) D. valve operation is directly controlled by the papillary muscles within theventricular wall. E. None of the above is correct.

Q: When ventricular walls relax: a. Mitral valve opens & tricuspid valve closes b. Tricuspid valve…

A: Mitral valve is also called the bicuspid valve  and it connect left Atrium to the left ventricle.…

Q: During diastole: A. the AV-valves are open and the aortic & pulmonary arterial valves are closed. B.…

A: Systole and diastole are part of cardiac cycle. Systole means contraction of heart and diastole…

Q: 38. The onset of Ventricular systole is associated with: A. the closing of the aortic valve B. the…

A: Heart is the pumping organ. It is responsible for pumping the blood to different parts of the body.

Q: The Internal Iliac artery is a:     A. Visceral branch of the aorta     B. Parietal branch of the…

A: Blood vessels are one of the three key components (The other 2 being the heart and the blood) are…

Q: Match the following:   ? Prevents backflow into the left ventricle   ?  Prevents backflow into the…

A: Valves are flap like structures which are present in heart and helps in movement of blood in one…

Q: The major baroreceptor(s) used to regulate blood pressure is/are located in… Group of answer…

A: Baroreceptors sense the change in blood pressure and transmit information to the brain so that…

Q: Which neurotransmitter/target receptor combinations would you expect to find in these areas of the…

A: Neurotransmitter and target receptor combinations in the areas of the heart are as follows: SA…

Q: 16. The onset of ventricular systole is characterized by the closing of the AVvalves and:   A. onset…

A: The cardiac cycle refers to the changes in the heart during the phase starting from one heartbeat to…

Q: 1.  which of the following structutre controls heart rate monitoring conceratration of co2 and o2 ?…

A: Since you have posted multiple we will solve the first question for you. If you want the specific…

Q: Which of the following anatomical structures is not part of the systemic circuit a. left ventricle O…

A: The cardiovascular system is composed of two main circuits - A. The pulmonary circuit B. The…

Q: The Right Subclavian artery is a:     A. Visceral branch of the aorta     B. Parietal branch of…

A: Blood vessels are one of the three key components (The other 2 being the heart and the blood) are…

Q: All of the followings are correct, except ---------------------. A. The mean blood pressure…

A: Blood is the fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide…

Q: The heart is located in the chest cavity in the space between the lungs called A. endocardium B.…

A: In multicellular organisms like humans, cavity cab be defined as fluof filled space. There are…

Q: 3) which of the following is the correct sequence of events during ventricular systole? 1- AV valves…

A: The human heart's activity from the start of one heartbeat to the start of the next is known as the…

Q: Muscles around the arterioles dictates where blood flows in the body…why is this useful?

A: Arteries are referred to as the blood vessels that function in carrying the oxygen-rich blood to the…

Q: which of the following factors will increase the cardiac output? a. decreased heart rateb. increased…

A: The objective of the question is to identify the factors that can increase the cardiac output.…

Q: a. Explain the difference in size and wall thickness of the ventricles. . b. Describe the function…

A: * The ventricles of the heart will have thicker walls than atria because blood is pumped out of…

Q: Which of the following is/are involved in regulating blood pressure? a. heart b. baroreceptors c.…

A: Blood Pressure can be defined as the pressure exerted by the blood flowing in the blood vessels on…

Q: All of the following are true of the anatomy of the heart except A. The epicardium has a serous…

A: The heart is a muscular organ that pumps oxygenated blood to the aorta, which conveys it to the…

Q: 7. If your instructor asked you to explain why the myocardium is thicker in the left ventricle than…

A: Heart is the major organ of the cardiovascular system. It is the mesodermally derived organ and it…

Q: The QRS wave of an ECG (or EKG) represents: a. depolarization of the ventricles. b. Depolarization…

A: ECG is basically a graphical representation of the electrical activity which takes place in the…

Q: Identify the TRUE statement (s). There may be several correct answers. A. An increased cardiac…

A: The cardiac cycle refers to all of the events that occur from the start of one heartbeat to the…

Q: The only area of the heart that receives innervation from the brain is called the: A.…

A: Cranial nerves are the part of the nervous system that assists in a variety of functions. These…

Q: An arrhythmia originating in an escape pacemaker in the AV junction with a rate of 40 to 60 beats…

A: Arrhythmia is an abnormality or irregularity in the rhythm, rate, or sequence of the heartbeat.…

Q: 16. Chordae tendineae depart from the heart valves to the papillary muscles in the __

A: The heart is derived from the mesoderm. It is present in the thoracic cavity.

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.