Cardiac myocytes - Study guides, Study notes & Summaries

Which has a higher mortality rate, cancer or CHF? correct answers -CHF, a common disease, especially in the elderly (disease of aging) T or F: CHF is always left sided correct answers FALSE- right, left, or both Most common cause of (R) Heart failure? Most common cardiomyopathy? Most common cause: correct answers - Left heart failure (chronic HTN) - Ischemic Cardiomyopathy - Ischemia or HTN What is CHF? correct answers -Clinical syndrome resulting from any structural or functional i...

Chagas Disease correct answersCaused by Trypanosoma cruzi parasite passed in the feces of Reduviidae/kissing bug Penetrates broken skin or intact mucous membranes forming a pseudocyst releasing inflammatory infiltrates into myocytes; stains with Giemsa & Wright Romana sign occurs when portal of entry is the conjunctiva or eyelid May resulting in: Enlarged heart- CHF, sudden cardiac arrest Enlarged esophagus- difficulty swallowing Enlarged colon- abdominal pain or constipation Tre...

Pulmonary circuit correct answers -low pressure -provides blood flow to the lungs Systemic circuit correct answers -high pressure -provides blood flow to all other tissues oxygen rich blood correct answers -poor CO2 -blood from lungs, through heart and out to body oxygen poor blood correct answers -CO2 rich -blood from tissues, through heart back to lungs Microcirculation correct answers -vessels too small to see -completely contained within a tissue -arterioles, capillar...

PNB Unit 3: Heart (Molecular) Exam 2024 2 similarities between skeletal and cardiac muscle cells -Answer-striated sarcomeres - sliding filament model how are the fibers of cardiac myocytes organized in the heart -Answer-fibers are arranged to wrap around the chambers so when contract, they squeeze the chambers of the heart and reduce their volume to create the pumping 3 features unique to cardiac muscle compared to skeletal -Answer-bifurcations anastomoses intercalated disks bifurcation...

According to the Frank-Starling law of the heart, increasing the _______________ within physiologic limits will cause increased contractility Preload Cardiac output is equal to heart rate time ________________ stroke volume The normal pacemaker of the heart is the ____________________ SA node The __________________ nerves increase heart rate and contractibility. sympathetic At resting potential, a cardiac myocyte is __________ on the inside compared with the outsi...

Desmosomes - ANSWER-Help hold cells together, give structural integrity to the muscle sheet What are cardiac myocytes? - ANSWER-muscle cells Cardiac myocytes are connected toe ach other by? - ANSWER-Intercalated discs, that contain multiple gap junctions and desmosomes The gap junctions allow the? - ANSWER-Spread of the action potential throug hthe muscle so that the cells contract together during a heartbeat Briefly define an action potential? - ANSWER--sodium channels open -Calciu...

Anatomy and Physiology Cardiovascular System MCQs Answers 2023/24 Introduction of CVS 1. The cardiovascular system… (A)Aids in the transfer of heat energy from organs deep within the body to the outside environment (B) Comprises pulmonary and systemic circulations that are in parallel with each other (C) Transports carbon dioxide from the lungs to tissues within organs (D)Transports oxygen from individual cells to the lungs 2. Cardiac output of the right side of the heart is what percen...

NS1643 Interacts around L529 of hERG to Alter Voltage Sensor Movement on the Path to Activation Jiqing Guo,1Yen May Cheng,2James P. Lees-Miller,1Laura L. Perissinotti,3Tom W. Claydon,2Christina M. Hull,2 Samrat Thouta,2 Daniel E. Roach,1 Serdar Durdagi,3 Sergei Y. Noskov,1,3,* and Henry J. Duff1,* 1Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada; 2Department of Biomedical Physiology and Kinesiology, Molecular Cardiac Physiology Group, Simon Fr...

principal determinants of BP - arterial pressures (CO X peripheral resistances) and Cardiac outputs (heart rate, myocardial contractility, blood volumes and venous returns) life style modifications available to tx hypertension - weight loss, sodium regulations, DASH diets, alcohol restriction, aerobic exercises and smoking cessation consequences of hypertension - myocardial infarction, heart failure and angina development, kidney disease risk, stroke and arterial pressure rising hypertensi...

entry of which ion prevents tetanus in cardiac myocytes? correct answer: Ca2+ 'funny' sodium channels are odd because they ________ correct answer: are activated by hyperpolarization instead of depolarization the wing muscles of hummingbirds rely on ________ to produce sound correct answer: twitches of short duration what is thought to explain the increase in force achieved by tetanus contractions relative to a single twitch? correct answer: complete stretching of elastic elements...