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Biology

1 answer:

SpyIntel [72]3 years ago

3 0

Answer:

The heart performs the following important functions: The primary function of the heart is to pump blood throughout the body. It supplies oxygen and nutrients to the tissues and removes carbon dioxide and wastes from the blood. It also helps to maintain adequate blood pressure throughout the body.

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Explanation:

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Menciona la proteína que permite la difusión facilitada del agua.¿Que experimento demostró la función de esta proteína?

SIZIF [17.4K]

CANAL  Las proteínas canal y muchas proteínas "carrier" sólo pueden trasladar sustancias a través de la membrana en forma pasiva. Este pasaje mediado por proteínas se conoce como difusión facilitada. La glucosa, por ejemplo, es una molécula hidrofílica que entra en la mayoría de las células por difusión facilitada.

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3 years ago

Compartments A and B are separated by a membrane that is permeable to K+ but not to Na+ or Cl-. At time zero, a solution of KCl

DaniilM [7]

Answer:

The electrical and diffusion potentials for K+ will be equal in magnitude and opposite in direction.

Explanation:

The cell potential may be defined as the potential difference between the inside of the cell and outside the cell. This difference is important for the transmission of nerve impulse.

The equilibrium condition may be defined as the condition at which the exit and the entrance of the ions will be equal. As the information in the question, Only potassium ions will move inward and outward of the cell. The potassium ions will move in opposite direction since the equilibrium has been reached.

Thus, the correct answer is option (D).

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3 years ago

Drawing a cartoon in pencil, then going back over it later with an ink pen is most similar to which biological process?

Montano1993 [528]

Given that the main reason for which an artist will retrace a drawing in pen is to correct errors and achieve a final draft, we can compare this to the biological process of DNA proofreading.

DNA proofreading is a biological process that takes place during the biosynthesis of DNA. During this time, a chain of DNA is read and a complementary chain is creating, effectively duplicating the genetic code.

During this process, DNA proofreading takes place. This is described as a process in which the DNA polymerase retraces the genetic code, detecting and fixing any errors in the synthesis before the strand is closed once again.

The fact is that both processes, despite taking place in astronomically different situations, share a final goal which is to prepare the "product" for the "final draft". This allows us to draw valid comparisons between the retracing of a cartoon and the proofreading of DNA by the DNA polymerase enzyme.

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