This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The heart's ability to vary stroke volume based solely on changes in end-diastolic volume is based ... (Read 88 times)

Collmarie

  • Hero Member
  • *****
  • Posts: 569
on: Jul 16, 2018
The heart's ability to vary stroke volume based solely on changes in end-diastolic volume is based on what mechanism?
 
  a. Automaticity
  b. Autoregulation
  c. Bohr equation
  d. Frank-Starling's law

Question 2

What is a normal cardiac ejection fraction?
 
  a. 24
  b. 44
  c. 64
  d. 84


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ddddd

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
The heart's ability to change stroke volume solely according to the EDV is an intrinsic regulatory mechanism based on the Frank-Starling's law.

Answer to Question 2

ANS: C
Thus, on each contraction, the normal heart ejects approximately two-thirds of its stored volume. Decreases in ejection fraction are normally associated with a weakened myocardium and de-creased contractility.


Collmarie

  • Member
  • Posts: 569
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

xiazhe

  • Member
  • Posts: 331
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

The theoretical design of nature reserves, based on the tenets of island biogeography. The theoretical design of nature reserves, based on the tenets of island biogeography.
Tissues of Heart Tissues of Heart
Heart Heart
Gross anatomy of the heart Gross anatomy of the heart
Long stroke used in lymphatic facilitation. Long stroke used in lymphatic facilitation.
What volume of 8.25 M HCl solution must be diluted to prepare 2.40 L of 0.500 M What volume of 8.25 M HCl solution must be diluted to prepare 2.40 L of 0.500 M
Video: What is Reverse Osmosis?

For a complete list of videos, visit our video library