Myocytes Study guides, Class notes & Summaries

electrically polarized at rest - inside of heart cell has a high potassium concentration, whereas the outside has a higher concentration of NA -higher positive charge outside the cell cause more negative charge inside cell electrical potential difference between the charges outside and inside of the cell wall Brainpower Read More 0:09 / 0:15 Depolarization NA moves into the cell rapidly in response to an electrical impulse - inside cell loses negative potential Replola...

What is resting membrane potential in ventricular myocytes? Threshold potential? correct answers RMP: -90 mV TP: -70 mV basic sequence of the synthesis of endogenous catecholamines correct answers Tyrosine converted by tyrosine hydroxylase > Dopa Dopa converted by aromatic L amino acid decarboxylase > Dopamine Dopamine converted by Dopamine B hydroxylase > NE NE converted by phentylethnolamine N methyltransferase > Epi Do the following structures elongate/tense or shorten...

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...

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...

Describe the architecture of an atom correct answers -The atom is the basic building block that makes up all matter -Protons (+) charge -Neutrons (neutral) charge -Electrons (-) charge -Protons and neutrons are in the center of the atom (nucleus), electrons orbit the nucleus in the electron cloud What is resting membrane potential in ventricular myocytes? Threshold potential? correct answers RMP: -90 mV TP: -70 mV How do you know if an atom carries a charge? What is a charged ...

EXPH 386 Exam 4 Questions and Answers Graded A+ The CV system delivers ____ ______ and ______ to active tissues Oxygen, fuel, nutrients The CV system returns ______ blood to the heart Deoxygenated The CV system delivers _______ a by-product of cellular metabolism from the body's core to the skin Heat The CV system transports ________ the body's chemical messengers Hormones The heart is a _____ pump Dual How many blood flow circuits are in the body 2 _______ circulation i...

Satellite cells play a role in _________ and are called _________ : muscle repair, adult muscle progenitor cells Muscle hypertrophy involves : the enlargement of existing cells what is hyperplasia : involves the formation of new cells through mitosis, but it is unlikely / an irregular process Satellite cells mainly contribute to : muscle repair by helping regenerate damaged muscle cells. skeletal muscle is made up of : muscle fascicles The epimysium is 2 | P a g e : the outer conn...

Chagas Disease - Caused 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 Treat with benznidazole...

Pathophysiology Exam Test 2 Practice VERIFIED SOLUTIONS 2023//2024 Which of the following valves directs blood flow from the left atrium to the left ventricle? A. Mitral B. Tricuspid C. Aortic D. Pulmonic - ANSWER A. Mitral The layer of squamous cells that lines the cardiac chambers and valves is called the: A. myocardium B. endocardium C. epicardium D. Pericardium - ANSWER B. endocardium How much does the atrial kick increase the blood volume? A. 5%-10% B. 10%-15% C. 15%-...

TSAC Chapter 2 Question and answers 2023/2024 verified to pass What makes up the cardiopulmonary system - correct answer respiratory and cardiovascular system what is the job of the cardiopulmonary system? - correct answer bring oxygen into the body and deliver it to active tissues to achieve ATP airways + lungs is what system - correct answer respiratory system heart + blood + blood vessels is what system - correct answer cardiovascular system what are the walls of the heart calle...