Refractory period - Study guides, Class notes & Summaries

depolarization - ANS - inside of cell becomes positive, outside negative - contraction - na+ channel opens - ELECTRICAL repolarization - ANS movement of cells = inside is negative again - na+ channels close, k+ channels open - MECHANICAL p wave qrs wave t wave - ANS - (p) atrial depolarization - (qrs) ventricular depolarization - (t) ventricular repolarization refractory period - ANS per of time where cardiac cells cannot respond to stimulus absolute refractor...

  lOMoARcPSD|5967629 2024/2025 RASMUSSEN UNIVERSITY MDC IV (NUR2755) MDC4 FINAL EXAM 100 QUESTIONS AND ANSWERS VERIFIED 100%;(GUARANTEED SUCCESS ) MDC4 Final Exam 1. Which of the following describes the process of initial surveillance of victims injury severity when administering first aid in an emergency situation? A. The Good Samaritan law B. an emergency interview C. Triage D. taking vital signs 2. The nurse reminds a group of certified nursing assistants (CNA) that for ...

All of the following major vessels contribute to blood flowing into the cranial vena cava except for the: (a) Brachiocephalic vein (b) Thoracic duct (c) Azygos vein (d) Femoral vein - ️️(d) Femoral vein Smooth muscles can be found in the: (a) Heart (b) Stomach (c) Pelvic limb (d) Diaphragm - ️️(b) Stomach In what order does the impulse for depolarization travel through the heart? (a) AV node, SA node, bundle of His, Purkinje fibers (b) SA node, AV node, bundle of His, Purkin...

3 steps of how the nervous system functions 1. Sense organs receive info 2. Brain and spinal cord process this info 3. Brain and spinal cord issue commands to muscles and gland cells synaptic delay time from the arrival of a signal at the axon terminal of a presynaptic cell to the beginning of an action potential in the postsynaptic cell 2 main division of the nervous system and organs of each Central Nervous System (brain and spinal cord) Peripheral nervous system (nerves and gan...

FISDAP READINESS Exam Prep 2022 Question Bank Where are Beta 1 receptors found? Heart and Kidneys Stimulation of Beta 1 receptors result in an increase of what? Heart: Inotropy, Chronotropy, Dromotropy Kidneys: Renin-Angiotensin-Aldosterone System = Vasoconstriction = Increase blood pressure Which node is located at the junction of the superior vena cava and the right atrium, is typically supplied by the Right Coronary artery, and fires at a rate of 60-100 bpm. SA Node Atrial depolar...

A drug that inhibits the release of norepinephrine will have the greatest affect on: - autonomic target cells. A group of skeletal muscle fibers together with the surrounding perimysium form a(n): - fascicle A muscle cell experiencing resting membrane potential is: - polarized A process that requires energy to move a substance against its concentration gradient is called: - active transport A substance moves by facilitated diffusion in a cell. - protein channel After acetylcholinesterase ...

CCDS IBHRE EXAM QUESTIONS CCDS IBHRE EXAM QUESTIONS|VERIFIED WITH ACCURATE ANSWERS Rheobase - Accurate Answerthe lowest point on a strength duration curve at an infinitely long pulse duration Chronaxie time - Accurate Answerthe pulse width at twice the rheobase value. It approximates the most efficient stimulation pulse duration Charge (formula) - Accurate AnswerCharge= I(current) x T(time) Furman's formula - Accurate AnswerEnergy(microjoules)= I(current)xV(voltage)xT(pulse widt...

Question 1 1 / 1 pts Which of these is not a characteristic of an action potential? Each normal action potential for a given cell type looks identical, depolarizes to the same potential, and repolarizes back to the same resting potential. An action potential at one site causes depolarization at adjacent sites, bringing those adjacent sites to threshold. If an excitable cell is depolarized to threshold in a normal manner, then the occurrence of an action potential is inevitable. On the...

2024 ECG ORIENTATION KAISER EXAM WITH CORRECT ANSWERS

Which of the following does NOT correctly match a term with its description? Depolarization --- Period during which sodium ions diffuse out of the neuron due to a change in permeability for these ions. Repolarization --- The interior of the cell becomes more negative due to the opening of potassium ion gates. Relative refractory period --- An exceptionally strong stimulus can trigger a response (action potential). Absolute refractory period --- Period during which the neuron cannot respond...