Description : The correct route through which pulse-making impulse travels in the heart is (a) SA node → Purkinje fibres → bundle of His → AV node → heart muscles (b) SA node → AV node → bundle of His → Purkinje ... fibres → heart muscles (d) AV node → SA node → Purkinje fibres → bundle of His → heart muscles.
Last Answer : (b) SA node → AV node → bundle of His → Purkinje fibres → heart muscles
Description : Rate of heart beat is determined by (a) Purkinje fibres (b) papillary muscles (c) AV node (d) SA node.
Last Answer : (d) SA node.
Description : Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when (a) AV node receives signal from SA node (b) AV valves open up (c) Ventricular ... blood from atria (d) Semilunar valves close down after the blood flows into vessels from ventricles.
Last Answer : (d) Semilunar valves close down after the blood flows into vessels from ventricles
Description : Assertion `:` Though AV node generates impulses, it is still not called as the pacemaker of heart. Reason `:` The rythmicity of impulse production is
Last Answer : Assertion `:` Though AV node generates impulses, it is still not called as the pacemaker of heart. ... . D. If both Assertion & Reason are false.
Description : What structures transmit the heart impulse from the av node to the ventricle?
Last Answer : Bundle of Hisatrioventicular bundle (bundle of his), right and left bundle bramches and the purkinge conducition fibers
Description : When no atrial impulse is conducted through the AV node into the ventricles, the patient is said to be experiencing which type of AV block? a) Third degree In third degree heart block, two impulses ... , type II, only some of the atrial impulses are conducted through the AV node into the ventricles.
Last Answer : a) Third degree In third degree heart block, two impulses stimulate the heart—one stimulates the ventricles and one stimulates the atria.
Description : The secondary pacemaker of the heart is known as the: a) AV node b) SA node c) Purkinje Bundle d) None of the above
Last Answer : ANSWER: A -- AV node
Description : Which of the following terms is used to describe a tachycardia characterized by abrupt onset, abrupt cessation, and a QRS of normal duration? a) Paroxysmal atrial tachycardia PAT ... fibrillation Atrial fibrillation causes a rapid, disorganized, and uncoordinated twitching of atrial musculature.
Last Answer : a) Paroxysmal atrial tachycardia PAT is often caused by a conduction problem in the AV node and is now called AV nodal reentry tachycardia.
Description : Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P ... QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.
Last Answer : a) QRS complex The QRS complex represents ventricular depolarization
Description : Injury to vagus nerve in humans is not likely to affect (a) tongue movements (b) gastrointestinal movements (c) pancreatic secretion (d) cardiac movements.
Last Answer : (a) tongue movements
Description : When the nurse observes that the patient's heart rate increases during inspiration and decreases during expiration, the nurse reports that the patient is demonstrating a) sinus dysrhythmia. Sinus dysrhythmia ... occurs when the sinus node regularly creates an impulse at a faster-than-normal rate.
Last Answer : a) sinus dysrhythmia. Sinus dysrhythmia occurs when the sinus node creates an impulse at an irregular rhythm.
Description : "Sodium Pump" operates in - (1) Muscle contraction (2) Heart beat (3) Nerve impulse (4) None of the above
Last Answer : (3) Nerve impulse Explanation: Na+/K+-ATPase (also known as sodium-potassium pump) is an enzyme located in the plasma them brane of virtually every human cell and is common to all cellular ... are voltagegated, which means that they can open and close depending on the voltage across the membrane.
Description : “Sodium Pump” operates in (1) Muscle contraction (2) Heart beat (3) Nerve impulse (4) None of the above
Last Answer : Nerve impulse
Description : Consider the following statements: 1. Propagation of a nerve impulse in a myelinated nerve fibre is different from that of unmyelinated fibre. 2. The impulse actually travels by leaping through the nodes of Ranvier in an unmyelinated fibre 3. ... incorrect? (a) 1, 2 (b) 1, 3, 4 (c) 2 only (d) 2, 3
Last Answer : Ans:(d)
Description : Adrenaline directly affects on (a) SA node (b) β-cells of Langerhans (c) dorsal root of spinal nerve (d) epithelial cells of stomach.
Last Answer : (a) SA node
Description : Impullse of heart beat originates from -
Last Answer : Impullse of heart beat originates from - A. S. A. Node B. A.V. Node C. Vagus Nerve D. Cardiac Nerve
Description : Vagus nerve is (a) X (b) IX (c) VII (d) V.
Last Answer : a) X
Description : The vagus nerve is the cranial nerve numbering (a) 7 (b) 5 (c) 10 (d) 9.
Last Answer : c) 10
Description : Which cranial nerve has the highest number of branches? (a) Vagus nerve (b) Trigeminal nerve (c) Facial nerve (d) None of these
Last Answer : b) Trigeminal nerve
Description : The respiratory centre which regulates respiration is located in (a) cerebellum (b) medulla oblongata (c) cerebral peduncle (d) the vagus nerve.
Last Answer : b) medulla oblongata
Description : Acid secretion of stomach is stimulated by (a) Gastrin (b) Histamine (c) Vagus nerve (d) All the above
Last Answer : (d) All the above
Description : Which term is used to describe the ability of the heart to initiate an electrical impulse? a) Automaticity Automaticity is the ability of specialized electrical cells of the cardiac conduction ... the specialized electrical cells of the cardiac conduction system to respond to an electrical impulse.
Last Answer : a) Automaticity Automaticity is the ability of specialized electrical cells of the cardiac conduction system to initiate an electrical impulse.
Description : Which of the following statements are true of coronary artery anatomy? A. Right bundle branch block in acute anterior myocardial infarction suggests obstruction prior to the first septal branch of the left ... the left anterior descending coronary artery. E. The left main stem is about 4 cm long
Last Answer : Ans: A
Description : The nurse auscultates the apex beat at which of the following anatomical locations? a) Fifth intercostal space, midclavicular line The left ventricle is responsible for the apex beat or the point of ... of the xiphoid process will detect gastrointestinal sounds, but not the apex beat of the heart.
Last Answer : a) Fifth intercostal space, midclavicular line The left ventricle is responsible for the apex beat or the point of maximum impulse, which is normally palpable in the left midclavicular line of the chest wall at the fifth intercostal space.
Description : Pick up the correct statement from the following with regards to C.P.M. network analysis of projects (A) The latest occurrence time of the node of which the activity arrow terminates minus the ... the activity arrow' originates, is called earliest start time of the activity (D) All the above
Last Answer : (D) All the above
Description : The cardiac impules hat results into the heart beat is delayed at `:-`
Last Answer : The cardiac impules hat results into the heart beat is delayed at `:-` A. Internodal tract B. AV Node C. Bundle of His D. Purkinje fibres
Description : How many beats per minute does the heart have to beat in order for it to be considered cardiac arrhythmia?
Last Answer : If your heart beat is below 50 and above 100 you may have arrhythmia. To make sure you don't it would be wise to visit a doctor to determine if you actually do or don't.
Description : Which of the following terms indicates the amount of blood pumped out of the ventricle with each contraction of the heart? a) Stroke volume Stroke volume is the amount of blood pumped out ( ... d) Preload Preload is the pressure created by a volume of blood within a ventricle before contraction.
Last Answer : a) Stroke volume Stroke volume is the amount of blood pumped out (ejected) with each contraction of the heart (heart beat). Stroke volume times heart rate equals cardiac output.
Description : If the vagus branch of frog is stimulate the heart will show `:-`
Last Answer : If the vagus branch of frog is stimulate the heart will show `:-` A. Stoppage of heart beat B ... heart beat C. Increased heart beat D. No change
Description : Assertion `:` If all external nerve supplies to a human heart are cut there will be no effect on the heart beat. Reason `:` Human heart is a myogenic
Last Answer : Assertion `:` If all external nerve supplies to a human heart are cut there will be no effect on ... False. D. If both Assertion & Reason are false.
Description : If parasympathetic nerve of the rabbit is cut then heart beat
Last Answer : If parasympathetic nerve of the rabbit is cut then heart beat A. Unaffected B. Decreases C. Increases D. Stop
Description : Heart beat is controlled by which cranical nerve `:-`
Last Answer : Heart beat is controlled by which cranical nerve `:-` A. `X^(th)` B. `IX^(th)` C. `III^(rd)` D. `V^(th)`
Description : Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above
Last Answer : all above
Description : The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
Last Answer : The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
Description : When the nurse observes an ECG tracing on a cardiac monitor with a pattern in lead II and observes a bizarre, abnormal shape to the QRS complex, the nurse has likely ... Ventricular fibrillation is a rapid but disorganized ventricular rhythm that causes ineffective quivering of the ventricles.
Last Answer : a) Ventricular bigeminy Ventricular bigeminy is a rhythm in which every other complex is a PVC.
Description : A 16-year-old-girl is found to have paroxysmal attacks of rapid heart rate. The antiarrhythmic of choice in most cases of acute AV nodal tachycardia is (a) Adenosine (b) Amiodarone (c) Flecainide (d) Propranolol (e) Quinidine
Description : Explain the mechanism through which a sound produces a nerve impulse in the inner ear. -Biology
Last Answer : answer:
Description : What is the difference between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre? -Biology
Description : Direction of nerve impulse is reversed in nerve with
Last Answer : Direction of nerve impulse is reversed in nerve with A. Axo -axonic B. Axo-dendrite C. Axo -axondendritic D. None of the above
Description : Consider the following statements: 1. Even when a nerve cell is not conducting an impulse, it is actively transporting K+ and Na+ ions in and out respectively against their concentration gradients at the expense of energy 2. As a ... is/are untrue? (a) 1 only (b) 1, 2, 4 (c) 2, 4 (d) 4 only
Description : The fastest nerve impulse in humans travel at
Last Answer : eight metres per second.
Description : What is nerve impulse?
Last Answer : These are electrical pulses which travel in the body from CNS to a body parts form the body parts to CNS to carrying different messages.
Description : During the nerve impulse transmission, following ion or ions may play significant roles D A. Sodium B. Potassium C. Chloride D. All of these
Last Answer : All of these
Description : A nerve impulse is essentially a wave of A A. Electrical charge B. Mechanical Charge C. Magnetic charge D. All of the these
Last Answer : Electrical charg
Description : Propagation of action potential is called a. Repolarization b. depolarization c. nerve impulse d. none of them
Last Answer : nerve impulse
Description : A nerve impulse is essentially a wave of a. mechanical charge b. electrical charge c. Both d. None
Last Answer : electrical charge
Description : A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro- hormonal control system? ... brain. (d) Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex.
Last Answer : (a) Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla.
Description : During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge? (a) First positive, then negative and continue ... and again back to positive (d) First negative, then positive and again back to negative.
Last Answer : (d) First negative, then positive and again back to negative.
Description : During the propagation of a nerve impulse, the action potential results from the movement of (a) K+ ions from intracellular fluid to extracellular fluid (b) Na+ ions from extracellular ... extracellular fluid to intracellular fluid (d) Na+ ions from intracellular fluid to extracellular fluid.
Last Answer : (b) Na+ ions from extracellular fluid to intracellular fluid