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const2013 [10]
3 years ago
7

Question 3

Biology
1 answer:
defon3 years ago
6 0

Answer:

solids is the right answer

Explanation:

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What is the sequence of travel by an impulse through the cardiac conduction system?
adoni [48]

The sequence of impulse through the cardiac conduction system starts from SA node passes to AV node to atrioventricular bundle fibers and finally to Purkinje fibers.

Heart is an organ that receives oxygenated blood form lungs and deoxygenated blood from different parts of body. Oxygenated blood is transported to different organs and deoxygenated blood is transported to lungs for oxygenation.

Now, to perform this transportation, the auricles and ventricles of heart contract and relax. In order to contract and relax, impulse generation is required, which begins at SA node or Sinoatrial node. It is also referred to as pacemaker of the heart. SA node contracts the atria and the impulse transfers to AV node or Atrioventricular node.

This is followed by transfer of impulse to atrioventricular bundle fibers which further passes it on to Purkinje fibres for ventricular contraction. Now the blood is sent to lungs and aorta as per it's oxygen status.

Learn more about cardiac conduction system -

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4 0
2 years ago
How many cell we have in human body ​
Liono4ka [1.6K]

Answer: Around 37.2 trillion cells

7 0
3 years ago
From left to right what are the three components of the nucleotide shown in this model?
kiruha [24]
Nitrogenous base, sugar and phosphate
4 0
2 years ago
10
Komok [63]

Answer:

Watery, sometimes foul-smelling diarrhea that may alternate with soft, greasy stools.

Fatigue or malaise.

Abdominal cramps and bloating.

Gas or flatulence.

Nausea.

Weight loss.

Explanation:

because the parasite is traveling through the intestine(which is a very important body part in you body)

7 0
3 years ago
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The idea that, when life originated on earth, a macromolecule other than dna served the role of information storage and that thi
svet-max [94.6K]

The RNA world hypothesis states that the earlier life-forms had relied only on RNA (Ribonucleic Acid) for the purpose of catalyzing the chemical reactions, and storing the genetic information. This hypothesis was proposed by Leslie Orgel, Carl Woese, and Francis Crick.

This hypothesis states that long before the living forms evolved to use DNA as the genetic storage material, the RNA molecules served the purpose of both storing the genetic information and carrying out catalysis, but because of its instability, DNA evolved.

Hence, the answer is RNA world hypothesis.

4 0
3 years ago
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