1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nastasia [14]
3 years ago
6

Why SA node called pacemaker of heart

Biology
2 answers:
zhannawk [14.2K]3 years ago
8 0
<h2>ANSWER:</h2>

It controls the heart rate by producing electrical impulses

<h2>EXPLANATION:</h2>

It controls the heart rate by producing electrical impulses and later transmitting electrical signals through the heart muscle, creating the heart to contract and pump blood everywhere into the body. The heartbeat originates from the S.A. node and expands to the walls of auricles which contract.

stich3 [128]3 years ago
3 0
SA Node<span> which is also known as the sinus node, is the natural pacemaker of the heart. It controls the heart rate by generating electrical impulses and then sending electrical signals through the heart muscle, causing the heart to contract and pump blood throughout the body. </span>

The SA Node is located in the outer layer of the right atrium of the heart, near the superior vena cava. It is made up of a group of cells (myocytes) positioned on the wall of the right atrium, at the center of the heart and near the entrance of the superior vena cava. These cells contract at a rate of about 70-80 times per minute, which make up the natural heart beat.



You might be interested in
Which is the main source of money used to pay for public primary and secondary schools?
Scorpion4ik [409]
A. Cuz the school gets money from the state
8 0
4 years ago
Read 2 more answers
Which qualities describe the entire open-ocean zone? Check all that apply. few nutrients
uysha [10]

<u>Answer:</u>

- few nutrients

- high pressure

- low temperatures

<u>Explanation:</u>

1. Few nutrients:  open-ocean zone is located way far from the land, which is the main source of the essential nutrients.

2. High pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.

3. Ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface.

4. Varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.

5. Low temperatures:  the temperature of open-ocean zone ranges from a low of -2°C to an average of 17°C.

8 0
3 years ago
Read 2 more answers
I’ll give brainlist to right answers only! There are three questions.
Anettt [7]

Scientists found that the first living things were likely prokaryotic because eukaryotic are evolved from the prokaryotic only.

<h3>What do you mean by Natural selection?</h3>

Natural selection may be defined as favorable variations that assist the organisms to survive and reproduce in a particular habitat.

Individuals that are better suited to their environment are likely to have more offspring and pass their genetic material on to future generations. This theory is referred to as Natural selection.

Scientists hypothesize that oxygen began to accumulate in the Earth's atmosphere after the appearance of living things with the ability to Photosynthesize.

To learn more about Photosynthesis, refer to the link:

brainly.com/question/19160081

#SPJ1

8 0
2 years ago
Naaman immediately followed Elisha's instructions.<br><br> True<br> False
ELEN [110]

Answer:

False.

Explanation:

False.

5 0
3 years ago
What's the lifecycle of HPV? (HUMAN PAPILLOMAVIRUS)
Masteriza [31]

Answer:

Explanation:

HPV DNA replication during its life cycle occurs in three separate phases (reviewed in [1, 2]). After viral entry into the cell nucleus and the activation of viral gene expression, the viral genome copy number increases to several hundred copies per cell during the initial phase of genome amplification.

4 0
3 years ago
Other questions:
  • Label the steps of electron transport leading to oxidative phosphorylation where atp is synthesized from adp using the energy st
    13·2 answers
  • Which is true of the light reaction of photosynthesis?
    7·1 answer
  • Lucy plans to buy a refrigerator. She wants a large model so it has enough space for all the food she needs to store so that she
    8·1 answer
  • Which of the following molecules are involved in pattern formation during development?
    6·2 answers
  • What is the greenhouse effect
    15·2 answers
  • What is the building block of each of the four classes of organic molecules
    12·1 answer
  • What energy yield (in molecules of ATPATP per molecule of monosaccharide) would you predict for the bacterial catabolism of raff
    14·1 answer
  • 1) Explain why increasing the amounts of the two enzymes changed the life spans of the mice.
    8·2 answers
  • Help me in biology ...
    8·1 answer
  • What are the uses of cholesterol in animals and their cells?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!