Why is the plateau phase so critical to cardiac musclefunction?

Q: What are Cardiac Action Potentials?

A: Unlike the action potential in skeletal muscle cells, the cardiac nerve impulse isn't initiated by…

Q: As a result of the long refractory period in the contractile cell refractory period, cardiac muscle…

A: Muscles perform various functions as movement, which is the fundamental purpose of muscles is to…

Q: Discuss the regulation of cardiac output during exercise.

A: The cells are the primary unit of life. The cells form the tissues which collectively form an organ.…

Q: How is cardiac output calculated?

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

Q: Ventricular Contractility increases in response to circulating Epinephrine.  What factor is…

A: The heart is one of the vital organs of a human body. It is responsible for pumping blood through…

Q: Why do differences occur in maximal shortening velocities?

A: The shortening speed of a muscle fiber is that the rate of its shortening.

Q: What is Preload and Afterload in the cardiac output of a human heart?

A: Preload is the initial stretching of the cardiac myocytes (muscle cells) prior to contraction. It is…

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: What are the uses of cardiac troponins?

A: Troponins are a group of protein molecules that are found in skeletal and cardiac muscles. The…

Q: Explain the term isovolumetric ventricular contraction?

A: The cardiac cycle in animals is the result of the atrial and ventricular contraction and relaxation…

Q: Explain differences between action potentials of cardiac muscle cells and those in nodal cells of…

A: On the surface of the heart, muscle fibers are arranged to form a fused interconnected mass termed a…

Q: Describe the process of Contraction Coupling in the Cardiac Muscle?

A: Answer: Introduction: Cardiac muscle, comprised of the contractile cells of the heart, contain a…

Q: If branch A is twice the length of branch B, what is true regarding the resistance in branch A…

A: The Poiseuille's law states that the flow of fluid is related to various factors including length…

Q: Describe the arrangement of cardiac muscle fibers.

A: BASIC INFORMATION MUSCLE It is a type of soft tissue which are found in most of the animals. The…

Q: We measured the stroke volume of the left ventricle. What was the average stroke volume of the rig|…

A: The term "cardiac output" (CO) is used to describe the amount of blood pumped up every minute by…

Q: Parasympathetic stimulation also increases the delay between atrial and ventricular contractions.…

A: In physiology, the parasympathetic nervous system is responsible for the stimulation of…

Q: Explain the intercellular structures of cardiac muscle.

A: Heart is a muscular organ that pumps blood throughout the circulatory system. It is situated between…

Q: What are the two functional importances of the intercalated discs of cardiac muscle?

A: The intercalated discs are a specific feature of cardiac muscle fiber where it supports synchronized…

Q: A drug is found to partially inactivate fast sodium channels. Mow would this drug change the action…

A: Given: To find a drug that partially inactivate fast sodium channels. How it change the action…

Q: Based on the force of pulse, did stroke volume increase or decrease with exercise?

A: KEY WORDS :- Stroke volume - It is the total blood been pumped from the left ventricle per heart…

Q: Describe the structure of intercalated discs in cardiac musclecells, and briefly discuss their…

A: Cardiac muscle tissues are tissues of the heart and help to provide strength and flexibility from…

Q: What is the cardiac output of a person with a resting stroke volume of 60 mL and a heartbeat of 80…

A: Cardiac output is the volume of blood the heart pumps per minute. Cardiac output= stroke volume×…

Q: Below are drawings of three different action potentials. Two of these occur in the heart, and one…

A: An action potential is a term that denotes the change in the resting membrane potential upon stimuli…

Q: What is the relationship between cardiac output and venous return in the steady state?

A: Cardiac output is the amount of blood pumped into the aorta by the heart per minute, and it is…

Q: If the duration of one pulse cycle is 0.5 seconds, what is the heart rate in beats per minute?

A: Pulse or pulse rate is the number of times heart beats in a minute

Q: What kind of catabolism occurs in the heart?

A: The heart pumps blood through a system of blood vessels, called the circulatory system. The heart…

Q: If an individual had a disease that reduced the strength of cardiac muscle contraction, what aspect…

A: In vertebrates, cardiac muscle, also known as myocardium, is one of three major muscle groups found…

Q: Explain how the heart rate, pulse period and pulse amplitude changed with exercise and why?

A: The circulatory system is one of the major systems of the human body. The circulatory system…

Q: Name three mechanisms that can increase cardiacoutput.

A: The amount of blood that the heart pumps, each minute is defined by the term known as cardiac…

Q: Why can acetylcholine cause an increase in stroke volume?

A: During contraction, blood pumped by the one ventricle with the per beat of the heart. It is measured…

Q: Why does heart rate increase with exercise?

A: Exercise may be defined as any physical body activity that can increase the fitness of an individual…

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: Knowing that a patient with chronic heart failure is using digoxin (digitalis) for more than 1 year,…

A: Digoxin is a medication that is commonly used to treat a variety of different heart conditions, such…

Q: In what ways is angiogenesis stimulated in skeletal muscle? In adipose tissue?

A: Skeletal muscle can be defined as one of three major muscle types, the others being known as cardiac…

Q: What type of cardiac rhythm is this??

A: Electrocardiogram (ECG): This is a simple test. this test can be used to check: -Heart's rhythm…

Q: What is Cardiac Pacemaker?

A: The heart and blood vessels are the main organs of the cardiovascular system. The heart, which is…

Q: During heavy exercise, how much cardiac output may increase?

A: Cardiac output is the amount of blood pumped by the heart into the aorta in one minute. Heart beats…

Q: Does the right ventricular stroke work index (RVSWI) measure the amount of work required by the…

A: Right ventricle is one of the four chambers of the heart which receives deoxygenated blood from the…

Q: Why must this change occur? (in reference to how does the heart rate differ before and after…

A: The process of circulation or internal transport is carried out by the pumping organ of the body,…

Q: How much of the total cardiac output may increase during the performance of heavy exercise?

A: The word "cardiac output" refers to the amount of blood pumped by the heart every minute. The…

Q: What is the significance of the extended refractory period in cardiac muscle?

A: Cardiac muscle contraction is a type of electrical event that begins at the sinoatrial node. As a…