What would be the fastest possible HR if the absolute refractory period for the cardiac myocytes was 250 ms?

Q: What are Cardiac Action Potentials?

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

Q: In cardiac autorhythmic pacemaker cells, how does parasympathetic stimulation make it more…

A: The heart shows autorhythmicity which means that the heart itself can initiate the heartbeat.…

Q: Describe the effects of sympathetic neuron stimulation on cardiacmuscle during contraction and…

A: Contraction in cardiac muscle occurs with the help of the sliding filament model of contraction.…

Q: Given heart rate = 72 bpm, stroke volume = 70 mL, calculate cardiac output.

A: Stroke volume: All the blood from body enters into right atrium from where it is pumped into right…

Q: Valerie’s heart rate is 80 beats/min. What is the length of one cardiac cycle?

A: The cardiac cycle is the performance of the human heart from the ending of one heartbeat to the…

Q: Explain the electrical events that generate each portion of the electrocardiogram.  How do they…

A: Heart conduction is necessary for blood regulation. As these conduction activities are related to…

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: What initiates action potentials in cardiac muscle?

A: Generation of action potential activates the neuron during the generation of stimuli. It is studied…

Q: If the S-A node discharges at 0.00 seconds, when will the action potential arrive at ventricular…

A: When an electrical impulse is generated in the heart, it initiates at the sinoatrial (S-A) node,…

Q: Briefly describe the events of excitation-contraction coupling in cardiac muscle cells.

A: Cardiac muscles are also called myocardium, which is a type of muscle in the body that is…

Q: cold affect pulse rate readings

A: Viral infections such as flu cause severe stress in the body, thereby affecting the heart rate,…

Q: Discuss Mechanical Events of the Cardiac Cycle?

A: The human heart contracts 72 times per minute at rest. During each heart beat, the heart chambers…

Q: If you were to look at an ECG trace of a 65-year-old male who has recently being diagnosed with a…

A: An electrocardiogram is used to records the electrical signals in our heart. It's a common and…

Q: Define QT interval

A: An electrocardiograph or electrocardiogram is a graphical representation of time versus voltage of…

Q: Contrast action potentials in ventricular muscle cells with SA node action potentials.

A: A fast, sudden, propagating and transitory change of the muscle and nerve cell's resting membrane…

Q: Draw a ventricular muscle cell action potential.

A: The heart is a four chambered structure that is responsible for pumping the blood into the arteries…

Q: 270-0980 CAAPHIE CONTROL

A: This is sinus bradycardia rhythm  Becouse  between two RR interval  have 6 large square box so heart…

Q: Explain why Purkinje fibers conduct action potentials morerapidly than other cardiac muscle cells

A: Purkinje fibers are components of the heart's advanced conduction system, which guarantees that an…

Q: If SA node (=natural pacemaker) fıring rate is 100 potentials per minute, but resting heart rate of…

A: Introduction: Some cardiac tissues are concerned with the initiation (impulse generation), and…

Q: Find the Q10 values from 10-20°C and 20-30°C (given heart rates in bpm at 10°C = 5bpm, 20°C = 10bpm,…

A: The temperature coefficient (Q10) represents the factor by which the rate (R) of a reaction…

Q: Why is the cardiac action potential propagated more slowly in an AV node cell then in an atrial or…

A: Cardiac action potential  It refers to the short alteration in the voltage i.e. membrane potential…

Q: How does a positive inotropic agent increase the strength of cardiac muscle contraction?

A: A positive inotropic agent is any drug or medication that can change the force of contraction with…

Q: What is the concept of Cardiac Output Max, Cardiac Output Rest, and Cardiac Output Reserve?

A: The heart, which pumps blood, is a crucial organ. All parts of the body receive oxygen and nutrients…

Q: Describe the effect of exercise on cardiac output

A: Cardiac output referred to as the amount of blood the heart can pump per minute. It depends on the…

Q: How is long refractory period beneficial for cardiac muscles?

A: Introduction: The heart is a muscular beating organ that transports deoxygenated blood to the lungs…

Q: How do you find the time duration (in ms) for each region of the PQRST in ECG

A: To  find the time duration (in ms) for each region of the PQRST in ECG, you can use the following…

Q: What mechanisms would be responsible for shortening of the ST segment TP interval T wave TP interval…

A: Introduction :- Electro-cardiogram (ECG) is a medical test that measures the electrical activity of…

Q: In a cardiac contractile cell what is the mechanism involved in the change in membrane potential?…

A: The cardiac contractile cell undergoes various changes in order to perform several activities and…

Q: Calculate changes in length of cardiac cycle with exercise and discuss their significance

A: The cardiovascular or the circulatory system transports gases, nutrients, hormones and metabolic…

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: we measured the stroke volume of the left ventricle. What was the average stroke volume of the right…

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

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: Describe the conditions at the sarcolemma of cardiac muscle cells at rest.

A: They are connected by intercalated discs. These are striated fibres with a single nuclei. Sarcolemma…

Q: Why does the cardiac muscle have a longer absolute refractory period compared to skeletal muscle?

A: A cardiac muscle is a specialized type of muscle that forms the musculature of the heart. Just like…