Exam (elaborations)
Heart Anatomy and Physiology
- Course
- Institution
This document contains ell reveiwed questions and answers 2024/2025 having correct answers questions and answers covering all human heart sructures
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
HEART ANATOMY AND PHYSIOLOGYQUESTIONS AND ANSWERS GRADED A+
2024/2025
Which branch of the ANS increases the strength of contraction within the contractile cells of the heart? -
Answer The sympathetic branch of the ANS.
Which branch of the ANS slows down HR? What neurotransmitter is used? What receptors are present
on the heart cells? - Answer The parasympathetic branch of the ANS slows down the heart rate. The
neurons release ACh which binds to muscarinic receptors on heart muscle cells.
Which branch of the ANS slows down the heart rate? - Answer Parasympathetic branch of the ANS.
Which branch of the ANS speeds up HR? What neurotransmitter is used? What receptors are present on
the heart cells? - Answer The sympathetic branch of the ANS speeds up the heart rate. The neurons
release NE which binds to beta-1 receptors on heart muscle cells.
Which ion causes the autorhythmic cardiac muscle cells to reach threshold? What type of gate do these
ions move through? – Answer Sodium ions moving through leak gates.
Which ion causes the plateau phase during an action potential in cardiac contractile muscle cells? What
type of gate do these ions move through? – Answer Calcium ions moving through voltage-regulated
gates.
Which ion causes the rapid depolarization during the action potential in cardiac contractile muscle cells?
What type of gate do these ions move through? – Answer Sodium ions moving through voltage-
regulated gates.
, Which ion causes the rapid depolarization during the action potential in the SA node conductile cells?
What type of gate do these ions move through? – Answer Calcium ions moving through voltage-
regulated gates.
Which ion causes the rapid repolarization during the action potential in cardiac contractile muscle cells?
What type of gate do these ions move through? – Answer Potassium ions moving through voltage-
regulated gates.
Which ion causes the rapid repolarization during the action potential in the SA node conductile cells?
What type of gate do these ions move through? – Answer Potassium ions moving through voltage-
regulated gates
Which valves are closing during the "dub" part of "lub-dub"? – Answer The semilunar valves (pulmonary
and aortic valves) are closing during the "dub" sound.
What does diastole mean? – Answer Diastole is the relaxation of a heart chamber. There is atrial diastole
and ventricular diastole.
What does systole mean? – Answer Systole is the contraction of a heart chamber. There is atrial systole
and ventricular systole.
What effect does an increase in afterload have on CO? – Answer An increase in afterload decreases CO.
What effect does an increase in preload have on CO? – Answer An increase in preload increases CO.
What is a cardiac cycle? – Answer One complete contraction and relaxation of the atria and the
ventricles.
What is cardiac output? – Answer The amount of blood that is ejected per minute. CO = SV x HR
SV = stroke volume
HR = heart rate
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller papichulosmasher. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $18.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76799 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now