• RES 207 Unit 1 REAL EXAM 2025
GRADED A LATEST VERSION 250
QUESTIONS AND ANSWERS GRADED
A+ {with practice exams}EXAM
ERABORATION
Define Bainbridge reflex
Select one:
a. the propulsion of blood resulting from contractions in the atrium
b. also called the atrial reflex, is an increase in heart rate due to an
increase in central venous pressure. - CORRECT ANSWER b. also called
the atrial reflex, is an increase in heart rate due to an increase in central
venous pressure.
Define chemoreceptor
Select one:
a. a sensory nerve activated by changes in the chemical environment
b. a cough that last approximately eight weeks.
c. a sensory nerve cell activated by changes in the chemical
environment. the receptors in the carotid artery are sensitive to PCO2 in
the blood signaling the respiratory center in the brain to increase or
decrease ventilation - CORRECT ANSWER c. a sensory nerve cell
activated by changes in the chemical environment. the receptors in the
carotid artery are sensitive to PCO2 in the blood signaling the respiratory
center in the brain to increase or decrease ventilation
Define starlings law:
Select one:
a. the more the cardiac fiber is stretched, the greater the tension it
generates when contracted.
,b. is the product of CO and SV
c. involves the relationship between vascular, smooth-muscle tone -
CORRECT ANSWER a. the more the cardiac fiber is stretched, the
greater the tension it generates when contracted.
The a pacemaker cell generates an electrical impulse to a polarized
cardiac cell, the potassium moves out and the sodium moves in causing
a spark or depolarization?
Select one:
True
False - CORRECT ANSWER True
The cells normally have potassium on the inside of the cell and sodium
on the outside. These cells are polarized?
Select one:
True
False - CORRECT ANSWER True
After the spark or depolarization the potassium and sodium return. This
is called repolarization?
Select one:
True
False - CORRECT ANSWER True
the phase of readiness; the muscle is relaxed and the cardiac cells are
ready to receive an electrical impulse?
A. repolarization
B. depolarization
C. Polarization - CORRECT ANSWER C. Polarization
the recovery phase; the muscle has contracted and the cells are
returning to a ready state?
A. repolarization
,B. depolarization
C. Polarization - CORRECT ANSWER A. repolarization
the phase of contraction; the cardiac cells have transmitted an electrical
impulse, causing the cardiac muscle to contract?
A. repolarization
B. depolarization
C. Polarization - CORRECT ANSWER B. depolarization
The four cardiac layers are the?
Select one:
a.pericardium, epicardium, myocardium and endocardium.
b.eenie, meenie, minie and moe.
c.excitability, automaticity, conductivity and contractility.
d.myometrium, pericardectomy, endocarditis and venous sac. -
CORRECT ANSWER a.pericardium, epicardium, myocardium and
endocardium.
The SA node?
Select one:
a.acts as a bridge between the atria and ventricles.
b.is a back up pacemaker only.
c.is the primary pacemaker of the heart.
d.conducts impulses rapidly throughout the ventricles. - CORRECT
ANSWER c.is the primary pacemaker of the heart
Which of the following could result in denervation of the heart -
I-high level cervical fracture
II-coronary artery bypass
III - heart transplant
IV - vagotomy.
Select one:
a.I
, b.II, IV
c.I, III, IV
d.II, III - CORRECT ANSWER c.I, III, IV
Oxygenated blood is pumped by the?
Select one:
a.right ventricle to the lungs.
b.left ventricle back to the lungs.
c.right ventricle to the body.
d.left ventricle to the body - CORRECT ANSWER d.left ventricle to the
body
The vagus nerve is the primary pathway for stimulation of the?
Select one:
a.parasympathetic nervous system.
b.both B and C.
c.somatic nervous system.
d.central nervous system. - CORRECT ANSWER a.parasympathetic
nervous system
The left coronary artery divides into?
Select one:
a.obtuse marginal and posterior descending arteries.
b.right and medial arteries.
c.anterior descending and circumflex arteries.
d.dominant and circumferential arterie - CORRECT ANSWER c.anterior
descending and circumflex arteries.
Starling's Law states?
Select one:
a.stroke volume reduction is responsible for excitability.
b.the greater the cardiac fiber stretch the greater the subsequent force
of contraction.
GRADED A LATEST VERSION 250
QUESTIONS AND ANSWERS GRADED
A+ {with practice exams}EXAM
ERABORATION
Define Bainbridge reflex
Select one:
a. the propulsion of blood resulting from contractions in the atrium
b. also called the atrial reflex, is an increase in heart rate due to an
increase in central venous pressure. - CORRECT ANSWER b. also called
the atrial reflex, is an increase in heart rate due to an increase in central
venous pressure.
Define chemoreceptor
Select one:
a. a sensory nerve activated by changes in the chemical environment
b. a cough that last approximately eight weeks.
c. a sensory nerve cell activated by changes in the chemical
environment. the receptors in the carotid artery are sensitive to PCO2 in
the blood signaling the respiratory center in the brain to increase or
decrease ventilation - CORRECT ANSWER c. a sensory nerve cell
activated by changes in the chemical environment. the receptors in the
carotid artery are sensitive to PCO2 in the blood signaling the respiratory
center in the brain to increase or decrease ventilation
Define starlings law:
Select one:
a. the more the cardiac fiber is stretched, the greater the tension it
generates when contracted.
,b. is the product of CO and SV
c. involves the relationship between vascular, smooth-muscle tone -
CORRECT ANSWER a. the more the cardiac fiber is stretched, the
greater the tension it generates when contracted.
The a pacemaker cell generates an electrical impulse to a polarized
cardiac cell, the potassium moves out and the sodium moves in causing
a spark or depolarization?
Select one:
True
False - CORRECT ANSWER True
The cells normally have potassium on the inside of the cell and sodium
on the outside. These cells are polarized?
Select one:
True
False - CORRECT ANSWER True
After the spark or depolarization the potassium and sodium return. This
is called repolarization?
Select one:
True
False - CORRECT ANSWER True
the phase of readiness; the muscle is relaxed and the cardiac cells are
ready to receive an electrical impulse?
A. repolarization
B. depolarization
C. Polarization - CORRECT ANSWER C. Polarization
the recovery phase; the muscle has contracted and the cells are
returning to a ready state?
A. repolarization
,B. depolarization
C. Polarization - CORRECT ANSWER A. repolarization
the phase of contraction; the cardiac cells have transmitted an electrical
impulse, causing the cardiac muscle to contract?
A. repolarization
B. depolarization
C. Polarization - CORRECT ANSWER B. depolarization
The four cardiac layers are the?
Select one:
a.pericardium, epicardium, myocardium and endocardium.
b.eenie, meenie, minie and moe.
c.excitability, automaticity, conductivity and contractility.
d.myometrium, pericardectomy, endocarditis and venous sac. -
CORRECT ANSWER a.pericardium, epicardium, myocardium and
endocardium.
The SA node?
Select one:
a.acts as a bridge between the atria and ventricles.
b.is a back up pacemaker only.
c.is the primary pacemaker of the heart.
d.conducts impulses rapidly throughout the ventricles. - CORRECT
ANSWER c.is the primary pacemaker of the heart
Which of the following could result in denervation of the heart -
I-high level cervical fracture
II-coronary artery bypass
III - heart transplant
IV - vagotomy.
Select one:
a.I
, b.II, IV
c.I, III, IV
d.II, III - CORRECT ANSWER c.I, III, IV
Oxygenated blood is pumped by the?
Select one:
a.right ventricle to the lungs.
b.left ventricle back to the lungs.
c.right ventricle to the body.
d.left ventricle to the body - CORRECT ANSWER d.left ventricle to the
body
The vagus nerve is the primary pathway for stimulation of the?
Select one:
a.parasympathetic nervous system.
b.both B and C.
c.somatic nervous system.
d.central nervous system. - CORRECT ANSWER a.parasympathetic
nervous system
The left coronary artery divides into?
Select one:
a.obtuse marginal and posterior descending arteries.
b.right and medial arteries.
c.anterior descending and circumflex arteries.
d.dominant and circumferential arterie - CORRECT ANSWER c.anterior
descending and circumflex arteries.
Starling's Law states?
Select one:
a.stroke volume reduction is responsible for excitability.
b.the greater the cardiac fiber stretch the greater the subsequent force
of contraction.
