26
The left bundle branch supplies the dropdown ventricle, while the right bundle branch supplies the dropdown ventricle.
A. B.
BIOL 252 Anatomy And Physiology II Module 2 Proctored ExamBiol 252 Anatomy And Physiology II Module 2 Proctored Exam
69 questions · Page 2 of 3
Biol 252 Anatomy And Physiology II Module 2 Proctored Exam is a nursing-school practice exam with 69 questions. It is written for nursing students preparing for this course exam and for NCLEX-style review. Every question has its own page showing the full stem, all answer options, the correct answer, and a written rationale explaining why each option is right or wrong.
Topics covered on this page: BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam.
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Start Practice ExamQuestions 26–50 of 69
27
What happens during repolarization of cardiac conducting cells?
A. The sodium ion channels open, allowing Na+ to enteB. The calcium ion channels open, allowing Ca2+ to enC. Sodium ion channels close, preventing Na+ from entD. Potassium ion channels open, allowing K+ to leave
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam28
The Purkinje fibers would fire at a rate of approximately 30-40 impulses per minute if the AV node were blocked.
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam29
Surface electrodes on the body can capture the heart's electrical activity, creating an electrocardiogram (ECG or EKG).
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam30
The dropdown complex represents the depolarization of the ventricles, which requires a much stronger electrical signal due to the larger size of the ventricular cardiac muscles.
A.
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam31
What is the cardiac cycle?
A. The time during which the heart is at restB. The flow of blood through the bodyC. The series of pressure changes that occur within tD. The electrical impulses of the heart
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam32
The S1 heart sound, or "lub," is created by the closing of the dropdown valves during ventricular contraction.
A.
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam33
Stroke volume (SV) refers to the amount of blood pumped by which ventricle?
A. Both ventriclesB. Left ventricleC. Right ventricleD. Both atria
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam34
The dropdown are more richly innervated by sympathetic fibers than parasympathetic fibers.
A.
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam35
How do proprioceptors contribute to the regulation of heart function?
A. They detect changes in position and movement durinB. They monitor blood pressure in the arteriesC. They detect chemical changes in the bloodD. They monitor heart rate directly
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam36
The Bainbridge reflex helps maintain homeostasis by increasing heart rate to ensure that the increased blood volume is pumped out of the heart.
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam37
Preload is the same as EDV (end-diastolic volume).
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam38
Contractility refers to the dropdown of the contraction of the heart muscle.
A.
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam39
Which of the following hormones is a positive inotropic agent?
A. GlucagonB. Calcium channel blockersC. PotassiumD. Beta blockers
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam40
Vasoconstriction of blood vessels lowers afterload by making it easier for the heart to pump blood.
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam41
Which structural feature is found in skeletal muscle fibers but not in cardiac contractile cells?
A. Myoglobin and lipid inclusionsB. A single nucleus per cellC. Triads formed by long T tubules and cisternae of tD. Sarcomeres along myofibrils
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam42
What distinguishes the contraction stimulus of cardiac contractile cells from that of skeletal muscle fibers?
A. Skeletal muscle fibers are activated by somatic moB. Cardiac contractile cells require anaerobic metaboC. Cardiac cells require direct stimulation from motoD. Skeletal muscle fibers have a long refractory peri
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam43
In cardiac muscle cells, what process links an action potential to muscle contraction?
A. Potassium efflux and membrane repolarizationB. Inhibition of myosin headsC. Closing of sodium channelsD. Calcium entry and activation of contractile protei
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam44
What role does ATP play in the muscle contraction cycle?
A. It directly causes the initial calcium release froB. It expands the H band by pushing thick filaments aC. It prevents the troponin-tropomyosin complex from D. It binds to mysoin heads, allowing them to detach
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam45
Which statement accurately describes the resting membrane potential of contractile cells in the heart?
A. Atrial cells have a resting potential of -80 mV, wB. Both atrial and ventricular cells have a resting pC. Atrial cells have a resting potential of-90 mV, whD. Both atrial and ventricular cells have a resting p
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam46
The relative refractory period occurs when the cardiac muscle cell has fully returned to its resting membrane potential.
A. TrueB. False
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam47
What causes blood to flow from the atria into the ventricles during diastole?
A. Higher pressure in the atria than in the veinsB. Contraction of the atriaC. Higher pressure in the veins than in the atriaD. Contraction of the ventricles
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam48
Which of the following best describes the stroke volume (SV) of the heart?
A. The volume of blood remaining in the ventricle aftB. The pressure exerted by the left ventricle to openC. The difference between end-diastolic volume (EDV) D. The total volume of blood in the ventricle before
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam49
What happens when ventricular pressure drops below the pressure in the aorta and pulmonary trunk during diastole?
A. The semilunar valves close, preventing backflow inB. The electrical impulse initiates ventricular depolC. The atrioventricular valves close, preventing backD. The ventricles contract, forcing blood into the gr
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam50
Which of the following correctly describes the effects of sympathetic and parasympathetic stimulation on heart rate?
A. Sympathetic stimulation releases norepinephrine (NB. Parasympathetic stimulation releases norepinephrinC. Sympathetic stimulation releases norepinephrine (ND. Parasympathetic stimulation releases acetylcholine
BIOL 252 Anatomy And Physiology II Module 2 Proctored Exam