the AV node__ c. AV Node __delay occurs allowing atria to contract___ d. AV Bundle (Bundle of His) _link between atria and ventricles__ e. Bundle Branches __convey impulses down the interventricular septum___ f. Purkinje Fibers ___convey the depolarization throughout the ventricular walls_____ 4. The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the _contractile__ cells. The resulting mechanical events cause a heartbeat. 5. A tracing
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muscle cell across the neuromuscular junction. As the Acetylcholine binds to a receptor on the muscle cell membrane‚ it signals the sodium leak channel to open. This causes a localized depolarization to occur. Soon after this causes the Na+ voltage gated channels to open spreading a wave of depolarization across the membrane and cell.le Cell at rest: As the muscle cell is at rest it has a resting potential of -90mV. The K+ is all located inside the cell‚ the Na+ is located outside of the
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potential? P wave: atrial depolarization; QRS complex which represents the onset of ventricular depolarization; T wave: ventricular replarization 22. What is the diagnostic significance of the ECG? Useful in diagnosing abnormal cardiac rhythms and conduction patterns and in following the course of recovery from a heart attack 23. How does each ECG wage relate to contraction and relaxation of the atria and ventricles? First wave: represents atrial depolarization which causes contraction
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Frog Cardiovascular Physiology Special Electrical Properties of Cardiac Muscle: Automaticity and Rhythmicity 1. Define the following terms. automaticity: Ability to depolarize spontaneously in the absence of external stimulation. rhythmicity: Depolarization/repolarization events occur in a regular and continuous manner. 2. Discuss the anatomical differences between frog and human hearts. The frog heart has a single ventricle and two atria. Dorsally there is an expanded area called the sinus venosus
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http://www.docstoc.com/docs/72619817/Bad-Fish-Part-answers-BioAP-home Diaphoresis: Excessive sweating‚ to an uncommon degree‚ as a symptom of disease or a side effect of a drug. Motor dysfunction: abnormality of the motor system. Paresthesia: abnormal skin sensation that may have no specific cause‚ such as tickling‚ tingling‚ burning‚ pricking‚ or numbness of a person’s skin with. Cyanotic: A bluish discoloration of the skin and mucous membranes resulting from insufficient oxygenation of the
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Principles of Human Physiology‚ 4e (Stanfield) Chapter 20 The Gastrointestinal System 20.1 Multiple Choice Questions 1) Which of the following is NOT a basic process of the gastrointestinal system? A) digestion B) filtration C) absorption D) secretion E) motility Answer: B Diff: 4 Page Ref: 568 2) Which of the following is the correct order of the layers of the gastrointestinal tract wall‚ from lumen to external surface? A) mucosa submucosa muscularis externa serosa
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to trigger the release of acetylcholine which is combined in proteins for activation. The active form of acetylcholine causes an increase in the permeability of the membrane to sodium ions which causes depolarization due to the threshold induced by the impulses that were stimulated. Depolarization of muscle proceeds to its entire length and is followed by muscular contraction. Thus‚ the impulse generated in the nerve is transmitted to the
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chemical messenger receptor‚ also called a neurotransmitter receptor‚ at the motor end plate and changes the receptor to prevent the binding of acetylcholine‚ the neurotransmitter‚ to the receptor. When the depolarization occurs‚ when the voltage-sensitive sodium channels feel the depolarization of the membrane it opens and then closes and becomes inactivated. The non-depolarizing agents‚ however‚ do not change the receptor‚ but change
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March 26‚ 2013 Lecture -The function of the eye is to convert photons of light into action potentials (nerve impulses). -The inner layer is a nervous tunic (made out of nerve cells)=retina. -Refraction: Bends light. -The purpose of the cornea and the lens is to take an object and focus every little detail of the object on the retina on the back of the lens. Upside down and backwards. -When light goes through medias‚ it bends. -Lens are suspended by ligaments behind the pupil. Suspensory ligaments
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ELECTROCARDIOGRAPHY TABLE OF CONTENTS Acknowledgement ---------- 1 Table of Contents ---------- 2 Introduction ---------- 3 Fundamentals of ECG a. Definition of Terms ---------- 4 b. Anatomy and Physiology Review ---------- 6 c. The Machine and Equipments ---------- 8 d. Waveforms ---------- 10 Purpose ---------- 11 Indications ---------- 12 Contraindications ---------- 13 Interfering factors ---------- 13 Normal Findings
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