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APEX + NBCRNA QUESTIONSBANK 24-25 WITH GUARANTEED ACCURATE ANSWERS

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Describe the architecture of an atom - Accurate 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 electr...

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  • November 16, 2024
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Describe the architecture of an atom - Accurate 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? - Accurate Answers✔✔RMP: -90 mV
TP: -70 mV


How do you know if an atom carries a charge?


What is a charged atom called? - Accurate Answers✔✔An atom will
have a neutral charge if electrons = protons


A positive charge if protons > electrons


A negative charge if electrons > protons


An ion is an atom that carries a positive or negative charge.


An ion with a positive charge is called a cation


An ion with a negative charge is called an anion


basic sequence of the synthesis of endogenous catecholamines -
Accurate 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


What is an ionic bond? - Accurate Answers✔✔An ionic bond involves
the complete transfer of valence electrons from one atom to another.
This leaves one atom with a negative charge and the other with a
positive charge. Metals tend to form ionic bonds.


Ionic bonds are common with metals as well as acids and bases.


Do the following structures elongate/tense or shorten/relax; motor
innervation?
- Vocalis
- Cricothyroid
- Thyroarytenoid - Accurate Answers✔✔-Vocalis: shortens/relaxes;
RLN


-Cricothyroid: elongates/tenses; SLN-external branch


-Thyroarytenoid: shortens/relaxes; RLN


What is a covalent bond? - Accurate Answers✔✔Involves the equal
sharing of electrons. This is the strongest type of bond.


Depolarization throughout the heart is facilitated by what structures? -
Accurate Answers✔✔Gap junctions

, What is a polar covalent bond? - Accurate Answers✔✔an "in-between"
type of bond


Atoms share electrons, but the electrons tend to remain closer to one
atom than the other. This creates a polar molecule where one area of the
molecule is relatively positive and the other is relatively negative.


dietary amino acid that is necessary for catecholamine synthesis -
Accurate Answers✔✔tyrosine


What are Van der Waals forces? - Accurate Answers✔✔Describe a very
weak intermolecular force that holds molecules of the same type
together.


Electrons orbiting a molecule are in constant motion. This creates a
temporary partial + and - charge at different parts of the molecule at any
given time. The net result is that electron rich areas of one molecule will
be attracted to electron poor areas of another molecule.


This is the weakest type of molecular attraction.


What muscle closes the laryngeal vestibules? - Accurate
Answers✔✔Eryepiglottic

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