Mexico is currently the major foreign source for marijuana smuggled into the united states.

Biology

1 answer:

andreyandreev [35.5K]3 years ago

8 0

The answer to this question is:

A-"True"

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7. Which answer below accurately reflects the organization of life flow

Svetllana [295]

It’s B.

Bases to Amino Acids to Proteins to Cells to Tissue to Organs to Organisms

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In the 1990s, scientists showed that Archaea and Bacteria are very different groups of organisms. How did this impact the classi

vampirchik [111]

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Which trait was most important in the development and advancement of modern fish?

ddd [48]

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Use the word "passive transport" in a sentence.

alekssr [168]

" What does passive transport mean " Good sentence or no

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4 years ago

What is the correct flow of depolarization in the heart?

natita [175]

Answer: The correct answer is option c.

Explanation:

Cardiac conduction system is formed by specialized cardiac muscle cells which enable the heart to contract in coordinated fashion.

The main component of this system are:

Sinoatrial node
Atrioventricular node
Bundle of His
Branched bundle
Punkinje fibers

SA node consists of cells known as pacemaker cells. These cells spontaneously generate action potentials which lead to the contraction of atria.

These potentials are then passed to AV node which relay them to bundle of His. These bundles are branched into right and left bundle which ultimately transfer these potentials to Purkinje fibers.

The potentials from these fibers lead to the contraction of ventricles.

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