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valkas [14]
3 years ago
15

Where can electrical signals that cause the heart to beat originate from

Biology
1 answer:
Ierofanga [76]3 years ago
5 0

Answer:

SA node (sinoatrial node)

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PLEASE HELP ME!!
zhuklara [117]

Answer: I GOT YOU!!!

Called solar system because Sun is biggest and heaviest

Solar means sun  planets revolve about (travel in circles around) the sun  path a planet travels is called its orbit  earth is the 3rd closest planet to the sun  all the planets go around in the same direction (like clockwise or counterclockwise), in roughly the same plane, but at different speeds  planets close to sun move fast, far out move slower  closer a planet is to the sun, the hotter it is, more or less.

The above is only approximately correct scientifically, but could be good enough for grade school.  Look up "solar system" in wikipedia for more details and accuracy.

Explanation:

Hope this helps! :)

8 0
3 years ago
What best explains the relationship between structure and function of the cell membrane?
ArbitrLikvidat [17]

The right option is; -the single layer membrane surrounding the outside of the cell allows for the easy removal of waste

The cell membrane is a biological membrane that surrounds a cell and separates the contents of the cell from its external environment. The cell membrane is composed of lipids and proteins and its main function is to protect the cell from its surroundings. The cell membrane also controls the molecules that enter and leave cell.


4 0
3 years ago
Which building or business in the city represent the mitochondria and why?
fiasKO [112]

Answer: Power company

7 0
3 years ago
For anyone who answers ill give points!
Sergeeva-Olga [200]

Answer:

B

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facilitated diffusion requires an ATP, which means it DOES take up energy

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2 years ago
the cell organlle is a series of tubes covered in ribosomes where proteins are made and send out into the cell
pantera1 [17]

Rough Endoplasmic Reticulum. it has a rough surface and is covered in ribosomes.

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