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vivado [14]
3 years ago
10

What are the unifying themes in biology?

Biology
1 answer:
Nana76 [90]3 years ago
8 0
There are 7 unifying themes in biology
1.Cell structure and function
2.Reproduction
3.Metabolism
4.Homeostasis
5.Heredity
6.Evolution
7.Interdependence
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Explain why e-waste is a problem and present one possible way of mitigating the growing e-waste problem.
dezoksy [38]
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4 0
3 years ago
Some stomach cells transport chloride ions inside and bicarbonate ions outside the cell via a same transport protein. Such a tra
Kryger [21]

Answer:

Such transport mechanism is called<u> Antiport.</u>

Explanation:

The production of hydrochloric acid (HCl) by the parietal cells requires the activity of the enzyme, carbonic anhydrase.In the presence of carbonic anhydrase  CO₂ and H₂O are converted  to HCO⁻   and H⁻.

The newly generated proton  (H+ )s transported into the lumen of the  stomach via the e H ₊₋K +ATPase (called the proton pump)Concurrently, HCO₃ ⁻  exits from the  basal surface (blood side) of the parietal cell via the HCO₃⁻   ₋ Cl antiporter.

The chloride ionneeded to form HCl, enters the parietal cell from the blood via the  HCO₃⁻₋Cl⁻ antiporter and exits at the luminal side by the Cl⁻ channel. Once within the lumen of the  stomach, cl⁻ combines with H⁺to form HCl.

The luminal K⁺ that is needed to maintain the activity of the proton pump(H⁺₋K⁻ATPase)enters the parietal cells from the stomach lumen by the H⁺₋K⁺ + ATPase and is then recycled back  into the lumen of the stomach by the K⁺ channel.

6 0
4 years ago
write the order that blood moves through the heart beginning with the return of blood to the heart from the upper and lower port
statuscvo [17]

Answer: circulatory system

Explanation:

Blood that return from the upper and lower parts of the body are deoxygenated hence they are transported to the heart for oxygenation. therefore blood enter the heart through vena cava ( the main vein) to the right auricles and it goes to the lower part of the heart which is the right ventricles which is more muscular. due to this blood is pumped from the right ventricles through pulmonary vein which pumps blood to the left ventricles through pulmonary artery and it is allowed to the left ventricles in the lower part of the heart and it pumped back in the body through the aorta( the main artery) .

8 0
3 years ago
What causes the refractory period in sodium channels after an action potential has been initiated? The sodium channel CANNOT be
harkovskaia [24]

Answer:

Explanation:

This is because once a Voltage Gated Sodium Channels closes up after depolarization, they can not be reopened.The  transmission  of action potential is such a way that  they are propagated one after the other in a forward direction, and never backwards. Thus once a sodium channel depolarizes,it closes up,  to under go a shot rest.No matter the strength of the next stimulus it will not open. Then the channel ahead of it opens to depolarise  to conduct action  potential, this again after shut opening closes up for the channel ahead to open.  This short period of rest when the sodium channels closes up  is called refractive period.  However after sometime of rest the rested sodium channels open, from the inactivated stage to conduct action potential.

4 0
3 years ago
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otez555 [7]

Answer:

its because of global warming

Explanation:

8 0
3 years ago
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