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Copy of Electrical Act of Heart Ques 1 (5/28/2026)
By Jason Poe
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Last updated 20 days ago
14 questions
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Note from the author:
Instructions
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Use your notes over the Electrical Activity of the Heart to help you with these questions.
Questions will not automatically regrade.
Once you submit your first attempt, check your score.
If below an 80%, reattempt them.
All correct answers are saved from the first attempt.
Up to 4 total attempts - 85% is highest score possible on attempts 2-4.
Don't have your notes? Go here.
Use your notes over the Electrical Activity of the Heart to help you with these questions.
Questions will not automatically regrade.
Once you submit your first attempt, check your score.
If below an 80%, reattempt them.
All correct answers are saved from the first attempt.
Up to 4 total attempts - 85% is highest score possible on attempts 2-4.
Don't have your notes? Go here.
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
The electrical impulse pauses just prior to the _______ to allow for proper blood filling
Question 6
6.
_______ , released by parasympathetic nerves, serves to decrease heart rate.
Question 7
7.
_______ make up 99% of all myocardial tissue.
Question 8
8.
Normal rhythmic beating of the heart is referred to as _______
Question 9
9.
Other than hormones and physiological conditions, the _______ and _______ of the autonomic nervous system contribute to influence the heart rate.
Question 10
10.
The _______ is located in the inferior area of the right atrium
Question 11
11.
Which ions lead to the formation of electrical signals in the heart? _______
Question 12
12.
What input prevents our resting heart rate from being extremely high? _______
Question 13
13.
Question 14
14.
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Corresponding Item
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Sequence the steps of electrical signal initiation and conduction.
Left and Right Bundle Branches
Atrioventricular Septum (signal pause)
Internodal Pathways of the Atria
Bundle of His
AV Node
Conducting Cells of Atria
SA Node
Bundle Branches Move Through the Interventricular Septum to a 180-Degree Turn
Purkinje Fibers
What factors can increase the sinus rhythm of the heart?
Decreased body temperature
Sympathetic nervous system stimulation
High levels of carbon dioxide
Adrenaline release
Which hormones can elevate the heart's sinus rhythm?
Insulin
Adrenaline
Thyroid hormones
Cortisol
Which conditions are associated with a faster sinus rhythm?
Hypoglycemia
Fever
Severe dehydration
Chronically not having proper water intake
Organize each of these in the following three categories
Parasympathetic Nerves
Hypothermia
Epinephrine
Thyroxine
Norepinephrine
SA Node
ANP
Dehydration
Sympathetic Nerves
Adrenaline
Hyperthermia
Purkinje Fibers
Acetylcholine
Increases Heart Rate
Decreases Heart Rate
Neither Increases and Decreases Heart Rate
Electrical Impulses
Pacemaker of the heart
Autonomic Nervous System (ANS)
Non-conductive tissue preventing disorganized impulses
Atrioventricular Septum
Hormone that increases heart rate
Myocardial Conducting Cells
Fibers that supply the ventricles with electrical impulses
Acetylcholine
Makes up 1% of myocardial tissue
Sinoatrial (SA) Node
Receives the impulse from the AV node
Purkinje Fibers
Part of the nervous system regulating heart rate
Bundle Branches
Hormone that decreases heart rate
Epinephrine
Signals generated by ion movement
Bundle of His
Divides into two