In a cardiac contractile cell what is the mechanism involved in the change in membrane potential? Depolarization: P wave Repolarization: QRS Complex, Hyperpolarization: T wave Pacemaker: K+ and Na+ flow, Depolarization: Pca rises Repolarization: Pk rises Depolarization: Pna increases, Peak: Na channels close, Plateau: Calcium channels close & Potassium channels open, Repolarization Potassium flows out & Calcium flows in Pacemaker: K+ and Na+ flow, Depolarization: Pca rises Repolarization: Pk rises, 4. If channels close Depolarization: Pna increases, Peak: Na channels close, Plateau: Calcium channels open & Potassium channels close, Repolarization Potassium flows out & Calcium flows out EO 0o OO

Q: A patient has tachycardia. Would you recommend a drug that prolongsor shortens the plateau of…

A: Tachycardia is a condition that makes our heart beat more than 100 times per minute. There are three…

Q: What effect would have cardiac arrhythmias, such as acute atrial fibrillation on cardiac output and…

A: The complications of heart arrhythmias might incorporate stroke, unexpected death, and…

Q: Trace the biochemical electrical pathways that result in cardiac conduction

A: The collection of specialized cardiac myocytes located in the heart walls that send electrical…

Q: Jnlike SA node cardiocytes, regular cardiocytes have a resting membrane potential that is . Regular…

A: There are different systems in the human body that perform various physiological processes. All…

Q: Should epinephrine or acetylcholine alter the rate of contraction of separated pieces of cardiac…

A: Neuotransmitters include epinephrine and acetylcholine. They work on beta and muscaric receptors,…

Q: Consider the equation cardiac output (CO) = stroke volume (SV) X heart rate Which of the following…

A: Afterload is the pressure the heart must work against to eject blood during systole. When…

Q: Subject: Neurophysiology  Many people thought that the inwardly rectifying K+ channel allows K to…

A: Movement of ions through specific ion channels in the membranes of specialized cells like the…

Q: Leaky Na+ channels in the cells of the SA Node do which of the following?   a-allow a slow…

A: d-allow a slow depolarization that eventually reaches the threshold for voltage-gated Ca2+ channels.

Q: Which statement about activation of heart muscle cells is TRUE?   A when a person is resting only a…

A: The electrical conduction system of the heart transmits signals generated usually by the sinoatrial…

Q: Why is it possible for acetylcholine to actually cause an increase in stroke volume, even though…

A: Acetylcholine is one of the most vital neurotransmitter in the human body, that is seen in both the…

Q: Where are the cardiovascular control centers located?

A: The cardiovascular system is made up mostly of the circulatory system, that is, the system of blood…

Q: What is a difference in membrane potential in the auto-rhythmic vs contractile cardiomyocyte auto:…

A: Cardiac tissue consist of muscles which helps in the contraction of the heart. They have two…

Q: Another disease slows the rate of production of cAMP in both contractile and pacemaker cardiac…

A: There are three different kinds of muscle tissues in vertebrates: skeletal muscle, smooth muscle,…

Q: Cardiac output is determined by what two variables ? preload and afterload end - diastolic volume…

A: Cardiac output, otherwise called heart output, is a term utilized in heart physiology that portrays…

Q: Why is the rate of cardiac muscle relaxation faster when a positive inotropic agent is present?

A: Inotropic agents refer to those substances that either increase or decrease the force of contraction…

Q: Describe the anatomy of movement of the wave of cell depolarization throughout the heart during the…

A: The cardiac cycle:It is comprised of a whole relaxation and contraction of both the atrium and…

Q: 4. Compare the action potentials of contractile cardiac muscle, autorhythmic cardiac muscle and…

A: Introduction:- The circulatory system is sometimes referred to as the blood-vascular system or…

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: raw a ventricular muscle cell action potential in the figure below. Briefly describe the changes in…

A: Similar to skeletal muscle, the resting membrane potential of ventricular cells, is around -90…

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…