Refractory periods - Samenvattingen, Aantekeningen en Examens

What are the 6 parts of the cardiac conduction cycle? correct answer: -SA node -Internodal pathways -AV node -Bundle of His -R and L bundle branches -Purkinje fibers What is the SA node? correct answer: -Small cluster of cells located in the upper R atrium *-Pacemaker of the heart* What are internodal pathways? correct answer: Impulses sent by the SA node that travel through the atrial muscle fibers via the intra-atrial pathways Allows for simultaneous depolarization and contra...

Test Bank For Applied Pathophysiology for the Advanced Practice Nurse, 1st Edition Lucie Dlugasch, Lachel Story. Which of the following coenzymes is(are) necessary for normal red blood cell nuclear maturation and DNA synthesis pathway? A) Vitamin D B) Folate C) Calcium D) Vitamin B12 (cobalamin) E) Both folate and vitamin B12 (cobalamin) Ans: E Complexity: Easy Ahead: Hematopoietic System Subject: Chapter 3 Title: Hematopoietic Function 2. von Willebrand factor is directly involved ...

What structure in skeletal muscle cells functions in calcium storage? - ANSWER-sarcoplasmic reticulum Creatine phosphate functions in the muscle cell by____________ - ANSWER-storing energy that can be transterred to ADR to resynthesize ATP During muscle contraction, myosin bridges attach to which active sites? - ANSWER-actin filaments The contractile units of skeletal muscles are_________ - ANSWER-Myofibrils Sarcomeres are functional units of ____________ muscle - ANSWER-cardiac & sk...

during the resting state, the inside of the cell is more electrically negative relative to the outside of the cell due to the differences in ions concentrations. - This negatively charged resting stated is referred to as the polarized state when the cardiac cell receives an electrical stimulus, sodium and calcium shift into the cell and potassium shifts out causing the cell to become more positively charged. - This alteration in ion charge is called depolarization, which normally result...

Based on Question 5: Know the typical electrical and concentration/chemical gradients that exist across the plasma membrane of a neuron for Na+, K+ and Cl-. Based on these gradients, be able to state what direction each ion moves across the membrane - -[Na+]out >> [Na+]in -[K+]out << [K+]in -Differences maintained by Na+ K+ ATPase pump; 3 Na+ ions out, 2 K+ ions in, creates a net loss of positive ions -resting membrane potential is -50 to -80 mV -for K+ and Cl-, concentration and...

Test Bank CHAPTER 1 Multiple Choice 1. What is the MOST common emergency to occur in the dental office? A. Mild allergic reaction B. Angina C. Syncope D. Anaphylaxis 2. All of the following procedures will help to prevent an emergency in a dental office EXCEPT: A. accurate medical history taking. B. taking and recording vital signs. C. updating the medical emergency kit. 3. If a patient responds positively on his or her medical history to epilepsy, you will need to be on th...

NCLEX 3500: Cardiac Exam Questions With 100% Correct Answers 2024/2025 Following a myocardial infarction, a client develops an arrhythmia and requires a continuous infusion of lidocaine. To monitor the effectiveness of the intervention, the nurse should focus primarily on the client's: 1. electrocardiogram (ECG). 2. urine output. 3. creatine kinase (CK) and troponin levels. 4. blood pressure and heart rate. - answerCorrect Answer: 1 RATIONALES: Lidocaine is an antiarrhythmic and is giv...

MED SURG 2 EXAM 1-Comprehensive Review of Medical Surgical Nursing II Exam MED SURG 2 EXAM 1 Ch. 25 – ASSESSMENT OF CARDIOVASCULAR FUNCTION Conduction System • Automaticity = ability to initiate an electrical impulse • Excitability = ability to respond to an electrical impulse • Conductivity = ability to transmit an electrical impulse from one cell to another SA node à AV node à bundle of his à right bundle branch...

1 BIO 210 CHAPTER 11 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ The nervous system is? Correct Answer: The master controlling and communicating system of the body The three functions of the nervous system are? Correct Answer: 1. Sensory input 2. Integration 3. Motor output The sensory input Correct Answer: gathers information by the internal and external sensory receptors The integration function Correct Answer: processes and interprets the sensory input T...

Electrical Activity of the HeartWhat is an action potential? - correct answer Rapid change in the transmembrane potential followed by a return to the resting membrane potential When do changes in transmembrane potential occur? - correct answer During changes in the permeability of the cell membrane to intracellular and extracellular ions Is the duration of APs in cardiac cells shorter or longer than in nerves cells or skeletal/smooth muscle? - correct answer Much longer What is the effe...