« previous next »

Author Question: The base of the heart is found at approximately the level of the _____ rib(s). a. first b. ... (Read 971 times)

rosent76

  • Hero Member
  • *****
  • Posts: 516
on: Jun 25, 2018
The base of the heart is found at approximately the level of the _____ rib(s).
 
  a. first
  b. second
  c. fourth
  d. fifth and sixth

Question 2

Rapid ejection of blood from the ventricular chambers of the heart occurs because the _____ and _____ valves open.
 
  a. pulmonic; aortic
  b. tricuspid; mitral
  c. pulmonic; mitral
  d. tricuspid; aortic


anoriega3

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jun 25, 2018
Answer to Question 1

B
The base of the heart is its upper portion and is formed mainly by the left atrium, with a small amount of right atrium. It lies at approximately the level of the second rib, immediately in front of the esophagus and descending aorta.

Answer to Question 2

A
When the ventricles contract, the pulmonic and aortic valves open, allowing blood to flow out of the ventricles.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Open space is found in a Lodgepole pine stand after thinning. Open space is found in a Lodgepole pine stand after thinning.
Conjugate acid-base pairs consist of a proton donor and a proton acceptor Conjugate acid-base pairs consist of a proton donor and a proton acceptor
Heart Sounds Heart Sounds
Five Areas for listening to the heart Five Areas for listening to the heart
Describe the development of atherosclerosis, including its role in the risk of heart disease Describe the development of atherosclerosis, including its role in the risk of heart disease
Heart drawing by 6 years old Heart drawing by 6 years old
Video: ATPase function - membrane transport, contractile proteins and synthesis

For a complete list of videos, visit our video library