What is the effort of different types/intensity of exerise on heart rate

Which of these accounts for the similarity between the P wave duration and the QRS complex duration despite the ventricle being much larger than the atria? Group of answer choices The His-Purkinje system has a faster conduction velocity than the atrial system The atria contain the same volume of blood as the ventricles Gravity increases the ventricular conduction velocity The rate of phase 4 depolarization is similar in all the conducting cells of the heart

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

Discuss the mechanism underlying AP generation by cardiac autorhythmic cells

which of the following conditions at the S-A node will cause a decrease in heart rate? increased sodium permeability decreased acetylcholin levelsincreased norepinephrine levels increased potassium permeabilityincreased calcium permeability

Which of the following are false about the inward rectifier? OA The inward rectifier current is carried by potassium OB. The inward rectifier carries inward current at potentials negative to the Nersnst potential for potassium under voltage clamp conditions. OC. The inward rectifier current obeys Ohm's law. OD. The inward rectifier is absent in the sino-atrial node. OE All of the above are true.

Describe the interactions of actin, myosin, and the troponin-tropomyosin complex in controlling heart function.

What action potential of specialized heart cells know the function of each channel and the process?

Can you please explain how to use this equation to get Flow(ml/min) Blood flow = π  ΔP r4 / ​8Lv

KEY Stimulus Medullary cardiovascular control center Sensory receptor Integrating center Efferent path Effector Change in blood pressure Parasympathetic Carotid and aortic baroreceptors neurons Sympathetic neurons SA node Ventricles Veins Arterioles Copyright 2009 Pearson Education, Inc. 1. In the diagram above, describe the role of the integrating center and two of the effectors. 2. What will atherosclerosis do to the peripheral resistance? 3. What will atherosclerosis do to the heart rate