During the period from the end of the S-wave until the beginning of the T-wave the entire heart is relaxed.  True  False

Q: Parasympathetic stimulation decreases the heart rate by Decreasing permeability of SA node cells…

A: Parasympathetic postganglionic nerve fibers tend to be vagus nerve and are cholinergic in nature.…

Q: +20 A Membrane -20 potential (mV) -40 Threshold -60 -80 0.8 1.6 Time (s) AV node threshold…

A: The SA node and AV node in the heart are responsible for generating electrical impulses that are…

Q: Which ion movement causes depolarization in the contractile cells of the heart? Ca++ leaving the…

A: The human heart is a muscular blood pumping organ made up of electrically excitable cardiac muscle…

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

A: We can measure exercise intensity using target heart rates, the talk test, or the exertion rating…

Q: one: Variation in P wave contour Irregular ventricular response Absent QRS complex P wave after QRS…

A: When there is contraction of the lower chamber or ventricles of the heart before they need to…

Q: A 43-year-old woman has congestive heart failure after a myocardial infarction. Before the…

A: Cardiac output (CO):- It is the amount of blood that is pumped by the heart (ventricles) per unit of…

Q: Slow conduction in the atrioventricular node is associated with which of the following? Group of…

A: An atrioventricular nodal conduction delay can occur in a few disorders and may result in a delay in…

Q: 'Which of the following ions is not directly involved in the myocardiocyte action potential? copper…

A: The myocardiocyte action potenital is found in the heart cells.

Q: The angiogenesis are vasodilation of blood vessels   Select one: True False

A: Blood is a body fluid that carries necessary nutrients and oxygen to the cells and transports…

Q: Upward deflection due to ventricular repolarization = P wave O PR interval O QRS complex O Twave

A: Electro Cardiogram ECG is a device that measures the impulse of the heart. It specifically tests the…

Q: Extreme increase in the heart rate can cause a decrease in the CO if ventricular filling is…

A: The amount of blood the heart pumps per minute is known as cardiac output, and it is measured by…

Q: Individual A B C Resting Heart Rate (beats/min) 70 98 35 Stroke Volume (ml/beat) 70 50 140 Cardiac…

A: Heart is the major organ of blood pumping and circulation.  It sends oxygenated blood to different…

Q: The heart beats without extrinsic stimulation from the autonomic nervous system. True or False

A: We know that The autonomic nervous system can be defined as the type of nervous system which…

Q: The heart beats without extrinsic stimulation from the autonomic nervoussystem. True or False

A: The autonomic nervous system can be defined as the type of nervous system which controls the body…

Q: Autorhythmic cells in the SA node intrinsically fire at a rate of 90 action potentials per minute.…

A: The heart is a major muscular organ of the cardiovascular system that is responsible for pumping the…

Q: Automaticity of the heart is the result of: Group of answer choices K+ leaking into the cell. Na+…

A: Automaticity of the heart is the result of:The answer is: more than one of the above.The Heart's…

Q: MEASUREMENT OF PULSE RATE Give the pulse rate in the following conditions, explain the changes of…

A: The heart beats constantly in order to keep blood flowing throughout the body. Its rate varies…

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: The period of ventricular contraction = O phase O of pacemaker action potential O phase 2 of…

A: Isovolumetric contractions occurs in The early  stage of heart contractions. The period of…

Q: Blood flow in the heart from right atrium to right ventricle to pulmonary arteries to the lung in…

A: The heart, blood vessels like arteries, veins and capillaries are part of the circulatory system of…

Q: Autorhythmic cells in the SA node intrinsically fire at a rate of - 90 action potentials per minute.…

A: While performing exercise, the cardiovascular apparatus performs two major tasks:- 1. Provides…

Q: take your pulse (or someone else’s pulse) either on your neck (carotid pulse) or wrist (radial…

A: The amount of blood that is pumped out by heart and circulated in the body to supply oxygen to the…

Q: What would your interpretation of this rhythm be? tututu Normal sinus rhythm with ventricular arrest…

A: Answer: Option 2 The given EKG shows second degree heart block type 1. It shows increasing in the…

Q: An average adult heart is 12 cm from base to apex, 8–9 cm at its broadest and 6 cm…

A: the heart is a muscular organ that pumps blood into the circulatory system's blood vessels. The…

Q: Describe the electrical event in the heart that occurs during each of the following: (a) the QRS…

A: Heart is a muscular organ which is responsible for pumping the fluid connective tissue called blood…

Q: Put the progression of the electrical excitation of the heart muscle in the right order Atrial…

A: Circulatory system is a part of body system which is involved in circulation of body fluids like…

Q: Fill in the chart Drug Classification Effect on Heart Rate Epinephrine     Acetylcholine…

A: Cardiac drugs are the drugs that used to improve  or treat the disorders associated  with…

Q: The pulse rate will on standing and the pulse rate standing after 5 minutes will to normal.…

A: Pulse rate is commonly called heart rate, and it refers to the number of contractions caused by the…

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: The greater the pulse pressure, the lower the pressure gradient driving blood from the aorta through…

A: Pulse pressure is a measure of the difference between diastolic pressure and systolic pressure. As…

Q: All of the followings are correct about the myogenic pacemaker except, --------------------- They…

A: The cardiovascular system is a principal organ system of the human body concerned with the transport…

Q: The ECG records the electrical stimulation of cardiac muscle by the conduction system and not the…

A: We can say that Electrocardiogram (ECG) is used to measure the changes in the electrocardiograph.…

Q: Which of the following interventions will increase cardiac stroke volume? increased activity of…

A: Stroke volume: The quantity of blood discharged from the ventricle during each cardiac cycle is…

Q: Individuals with hypertension should avoid maximal effort resistance training (e.g., 1RM lifts) due…

A: Such type of exercises focuses on  to strain under a heavy load, typically at a  maximum intensity.…

Q: In 1st degree heart block there is Progressively prolonged PRI followed by QRS drop O PRI > 0.20 in…

A: Heart block is a medical emergency where the heart beats at a slower or irregular rate. A…

Q: Potential differences between positive and negative electrodes that are generated by electrical…

A: Depolarization is the change in the membrane potential of a cell from a negative to a positive value…

Q: An increase in end-diastolic volume always causes an increase in stroke volume in a normal heart…

A: Stroke volume It is the amount of blood that is forced out from the ventricle per cardiac cycle. It…

Q: With endurance athletes, an increased stroke volume at rest will occur because of   Select 3…

A: Stroke volume is defined as the amount of blood that can be pumped out by heart per beat.

Q: Ectopic beats can be caused by myocardial irritability. As A/Os we may be able to reduce myocardial…

A: Ectopic beats Cardiac dysrhythmia is associated with abnormal electrical impulse conduction…

Q: which of the following conditions at the S-A node will cause a decrease in heart rate? increased…

A: The objective of the question is to identify which of the given conditions at the Sinoatrial (S-A)…

Q: Number of double circulations completed by the human heart per minute under resting conditions is

A: Components of closed circulatory system It consists of heart to pump the blood, blood vessels like’s…