Answer:
O fuso mitótico
Explanation:
fuso é uma estrutura feita de microtúbulos, fibras fortes que são parte do "esqueleto" da célula. Sua função é organizar os cromossomos e movê-los durante a mitose. O fuso cresce entre os centrossomos a medida que eles se separam.
Answer:
The sequence of the DNA nucleotides determines the genetic code, which determines the structure and function of proteins. The proteins produced by a cell determines its structure and functions.
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Answer:
The Na⁺/Ca²⁺ exchanger, which couples the movement of Na⁺ down its electrochemical gradient with the movement of Ca²⁺ against its electrochemical gradient, is a(n) <u>symporter secondary active transport </u>because Ca²⁺ and Na⁺ move in different directions across the membrane.
Explanation:
The Na⁺/Ca²⁺ exchanger is a secondary active transport because it uses the energy of the Na⁺ that moves in favor of its electrochemical gradient to bring a Ca²⁺ ion against its electrochemical gradient inside the cell. This transport needs the help of a symporter, which is a protein that moves two different ions in the same direction.
The proteins that bind to signaling<span> molecules and initiate a physiological response are also referred to as receptors.
</span>Cell-to-cell communication relies upon the adhesive molecules integrins. Integrins allow cells to maintain contact with one another.<span> Integrins are mechanical links and relay signals both to and from cells.</span>
