[Answered] The sinoatrial (SA) node initiates the cardiac cycle and is sometimes called the heart's ...

This topic contains a solution. Click here to go to the answer

Author Question: The sinoatrial (SA) node initiates the cardiac cycle and is sometimes called the heart's ... (Read 43 times)

Anajune7

Hero Member
Posts: 574

on: Jul 18, 2018

The sinoatrial (SA) node initiates the cardiac cycle and is sometimes called the heart's _____________.

A. electrode C. generator
B. pacemaker D. alligator clamp

Question 2

The heart is contained within a closed cavity called the ________.

A. mediastinum C. chest cavity
B. pleural space D. thoracic outlet

Need homework help now?

Ask unlimited questions for free

Ask a Question

Marked as best answer by a Subject Expert

leannegxo

Sr. Member
Posts: 374

Reply #1 on: Jul 18, 2018

Answer to Question 1

ANS: B

Answer to Question 2

ANS: A

Anajune7

Member
Posts: 574

Reply 2 on: Jul 18, 2018

YES! Correct, THANKS for helping me on my review

31809pancho

Member
Posts: 317

Reply 3 on: Yesterday

Excellent

« previous next »

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.