Myocytes Guías de estudio, Notas de estudios & Resúmenes

NBME Exam Questions & Answers 2024/25 Transverse histological section of the cervical spinal cord at C6 shows degeneration of both corticospinal tract and atrophy of the ventral roots - ANSWERSALS Neurotransmitter released in excess following ischemia and can initiate a receptor-mediated ca2+ influx that leads to neuronal death - ANSWERSGlutamate Change in muscle 3 months after starting a weight lifting program - ANSWERSIncreased number of mitochondria Increased actin per myocyte ...

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...

BERNE AND LEVY PHYSIOLOGY 7 TH EDITION KOEPPEN ALL CHAPTERS(01-44) Chapter 01: Principles of Cell FunctionTest Bank Multiple Choice 1. The subcellular structure that degrades proteins is called the: A. Tight junction B. Mitochondria C. Lysosome D. Plasma membrane E. Ribosome ANS: C 2. An experiment is done to measure the uptake of an amino acid into a cell. The following data are obtained: If Na+ is removed from the extracellular bathing solution, or if a drug is added that...

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...

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...

What are the two circuits of the CV system? correct answers 1. Pulmonary circuit 2. Systemic circuit What are the two features of the pulmonary circuit? correct answers 1. Low pressure 2. Provides BF to lungs What are the two features of the systemic circuit? correct answers 1. High pressure 2. Provides BF to all other tissues What is the macrocirculation? correct answers Arteries and veins What is the microcirculation? correct answers Arterioles, capillaries, and veins What do...

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 ...

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...

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%-20% D. 20%-25% - Answer-C. 15%-20% Which of the following waves corresponds...

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...