100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
BIO 251: EXAM 3 – QUESTIONS WITH SOLUTIONS $10.49   Add to cart

Exam (elaborations)

BIO 251: EXAM 3 – QUESTIONS WITH SOLUTIONS

 11 views  0 purchase
  • Course
  • BIOS 251
  • Institution
  • BIOS 251

BIO 251: EXAM 3 – QUESTIONS WITH SOLUTIONS

Preview 2 out of 12  pages

  • September 9, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIOS 251
  • BIOS 251
avatar-seller
LeCrae
BIO 251: EXAM 3 – QUESTIONS WITH SOLUTIONS

Cardiac output is determined by what two variables?
A) stroke volume and ejection fraction
B) heart rate and ejection fraction
C) end-diastolic volume and end-systolic volume
D) heart rate and stroke volume
E) preload and afterload Right Ans - D

Regulation of the heart (or any organ or tissue) by neural input, circulating
hormones, or any other factor originating from outside the organ is referred
to as ________ control.
A) intrinsic
B) neurogenic
C) extrinsic
D) voluntary
E) myogenic Right Ans - C

Which of the following structures is poorly innervated by the parasympathetic
nervous system and, therefore, an increase in parasympathetic activity has
little effect on this structure?
A) ventricles
B) conduction pathway
C) sinoatrial node
D) Purkinje fibers
E) atrioventricular node Right Ans - A

The SA node is innervated by the
A) sympathetic nervous system only.
B) somatic nervous system only.
C) parasympathetic nervous system only.
D) sympathetic and parasympathetic nervous systems.
E) sympathetic, parasympathetic, and somatic nervous systems. Right Ans -
D

Which of the following is an effect of parasympathetic activity to the heart?
A) The rate of spontaneous depolarization in SA nodal cells decreases.
B) SA nodal cells are depolarized.
C) Heart rate is increased.

, D) cAMP is activated.
E) Postganglionic neurons release acetylcholine, which binds to nicotinic
cholinergic receptors in
the SA node. Right Ans - A

Which of the following is a FALSE statement about sympathetic activity to the
SA node?
A) Norepinephrine binds to beta1 adrenergic receptors.
B) Potassium channel closing is enhanced.
C) cAMP levels in the pacemaker cells increases.
D) Funny channel opening is enhanced.
E) The rate of spontaneous depolarization is increased. Right Ans - B

Under resting conditions, heart rate is primarily under the control of what
control system?
A) the parasympathetic nervous system
B) the somatic nervous system
C) the sympathetic nervous system
D) intrinsic mechanisms
E) epinephrine Right Ans - A

An increase in heart rate can be mediated through which of the following?
A) a decrease in parasympathetic nervous activity only
B) a decrease in sympathetic activity only
C) an increase in sympathetic activity only
D) an increase in parasympathetic activity and a decrease in sympathetic
activity
E) a decrease in parasympathetic activity and an increase in sympathetic
activity Right Ans - E

Which of the following would NOT result from an increase in ventricular
contractility?
A) increased ejection fraction
B) increased stroke volume
C) decreased end-diastolic volume
D) decreased end-systolic volume
E) increased proportion of end-diastolic volume that is ejected Right Ans -
C

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 LeCrae. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

83637 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$10.49
  • (0)
  Add to cart