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garri49 [273]
3 years ago
14

How does the blood circulatory system work?

Biology
2 answers:
mel-nik [20]3 years ago
7 0

Answer: the heart pumps blood throughout the body through arteries, vessels, and veins.

Explanation:

Dimas [21]3 years ago
4 0

Answer:

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body

Explanation:

It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart.

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9. Knowing what you know about how a substance travels in
Romashka-Z-Leto [24]

Answer:

Higher

Explanation:

Molecules such as oxygen move from a higher concentration to a lower concentration across a semi-permeable membrane. This process is called simple diffusion.

Therefore, for oxygen to leave the alveoli and enter the blood, there would need to be a higher concentration of oxygen inside the alveoli and a lower concentration of oxygen in the blood.

6 0
3 years ago
Which one of the following nucleotide pairs would be found in a DNA molecule?
MrRa [10]

Guanine-cytosine is one of the  nucleotide pairs that would be found in a DNA molecule. The other is Adenine- Thiamine.

Explanation:

Pyrine bases – Adenine & Guanine-  pair with pyrimidines bases – Cytosine and Thiamine. Adenine pairs with Thiamine while Cytosine pairs with Guanine.

In RNA, however, while this same principle of base pairing is observed, rather than Thinmaine, RNA has Uracil in its place. Therefore, in RNA, Adenine pairs with Uracil. There is no Thiamine in RNA.

Learn More:

For more on base-pairing check out;

brainly.com/question/2739575

brainly.com/question/10444320

#LearnWithBrainly

8 0
3 years ago
In depression, anxiety is triggered by what neurotransmitter?
IRISSAK [1]

Answer:

option D: GABA ( gamma-aminobutyric acid )

Explanation:

The amount of neurotransmitters released during depression can not be properly measured. The neurotransmitters released due to anxiety are GABA, serotonin, Cck, and glutamate.

The rise in level of neurotransmitter, GABA in depression causes anxiety. Thus, option D is correct.

8 0
3 years ago
Is this stomata open or closed??
tino4ka555 [31]

Answer: Open

Explanation:

3 0
2 years ago
Read 2 more answers
Which state of matter consists of ionized particles? solid liquid gas plasma
Radda [10]

The correct answer is option D, Plasma

Plasma is the condition where a hot gas is ionized. It consists of equal numbers of positive and negative ions. It is an electrically conducting environment which is considered as the fourth state of matter. Plasma gases are affected by electric and magnetic waves as compared to the neutral gases (which remain unaffected by electric and magnetic wave) due to the presence of negative and positive ions.  

5 0
2 years ago
Read 2 more answers
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