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barxatty [35]
3 years ago
5

NEED FAST

Biology
1 answer:
grin007 [14]3 years ago
3 0
  • Answer:The septum is the cartilage in the nose that separates the nostrils.Typically, it sits at the center and divides the nostrils evenly.
  • The two atria are thin-walled chambers that receive blood from the veins. The two ventricles are thick-walled chambers that forcefully pump blood out of the heart. ... The right atrium receives deoxygenated blood from systemic veins; the left atrium receives oxygenated blood from the pulmonary veins.
  • A pacemaker is a small device that's placed under the skin in your chest to help control your heartbeat. It's used to help your heart beat more regularly if you have an irregular heartbeat (arrhythmia), particularly a slow one. Implanting a pacemaker in your chest requires a surgical procedure.
  • In a four-chambered heart, such as that in humans, there are two ventricles that operate in a double circulatory system: the right ventricle pumps blood into the pulmonary circulation to the lungs, and the left ventricle pumps blood into the systemic circulation through the aorta.
  • Your heart has four valves that keep blood flowing in the correct direction. These valves include the mitral valve, tricuspid valve, pulmonary valve and aortic valve. Each valve has flaps (leaflets or cusps) that open and close once during each heartbeat.

Explanation:

Hope this helps ツ

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PLEASE HELP!!!!!!!
lys-0071 [83]

Answer:

When the required direction of transport is opposed to concentration levels, a cell <u>will </u> expend energy to force<u> ions</u> across its membrane.

Explanation:

If the concentration gradient is opposite to the direction of transport of minerals, then the cell will use energy to transport mineral ions from a lower concentration to a higher concentration. The most common process through which this happens is termed as the active transport.

The process of active transport is opposite to passive transport. In passive transport, molecules move from a higher concentration to a lower concentration.

3 0
3 years ago
Because the majority of cell differentiation occurs during the ____ phase, this is the time when exposure to teratogens can do t
Greeley [361]
Because the majority of cell differentiation occurs during the EMBRYONIC phase, .................. The embryonic stage of pregnancy is the period after implantation during which all the important organs and structures in the growing fetus is formed. Tetratogens are factors that caused malformation of embryo. Exposure to tetratogens during embryonic stage cause most destructive damages.
3 0
3 years ago
You observe a tissue under a microscope. There appears to be a lumen on one side of the tissue. Lining this lumen is a single la
Papessa [141]

Answer:

Explanation:

So if there are lumen, there are class B skin. Therefore, with our connecting brain, we can infer that it's obvious what projection it makes. One like the monster effect, to us it is disturbed.

To summarize, they are packed tightly, within class B (known as dead-zone skin). In that, we have our shoebox. That shoebox tissue is known as shatire tissue.

4 0
3 years ago
The cell theory was constructed by _____.
Trava [24]
The cell theory was constructed by <span>Schleiden and Schwann.
</span>
>Matthias Jakob Schleiden<span>  was a German </span>botanist<span> and co-founder of the </span>cell theory, along with Theodor Schwann<span> and </span>Rudolf Virchow (not really credited towards it, he is a contributor to the said theory.
>Robert Hook---largely attributed the cell theory;started the study of cells known as the cell biology.
>Carolus Linnaeus---<span>a Swedish </span>botanist<span>, physician, and </span>zoologist<span>, who formalized the modern system of naming organisms called </span>binomial nomenclature<span>.</span>
7 0
3 years ago
Read 2 more answers
1. Why is it a good idea for humans to create models of how populations are changing?
ollegr [7]
It is a good idea to create models of how populations are changing so that we are able to take a better look into what is causing it, if it is a bad or good thing that is taking place, how socioeconomic status may be playing an affect on the changes ect. It can also show if there are concerns coming on the horizon by looking at the change and poll shifts.
5 0
3 years ago
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