Answer:
The type of protein that binds a ligand on the cell surface or within cells are transmembrane receptors. These proteins have 3 domains: an extracellular part that does the binding, a hydrophobic domain that extends through the membrane, and an intracellular region that transmits the signal. The most common membrane-anchored receptors are: G protein-coupled receptors, receptor tyrosine kinases, and ligand-gated ion channels.
<span> Obviously its surface area gets bigger, but the real issue is that its surface area gets bigger at a slower rate than its volume. In other words, the surface area to volume ratio decreases, so before long there is not enough surface area to take in enough nutrients to feed the greater volume. This is the principle limiting factor in how large cells can grow. if the cell is getting bigger as a result of being placed in a hypotonic solution. That situation could end in the cell bursting (blowing up). However, the question sounds like it is asking about getting bigger through normal cell growth. hope it helped you. :)
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Answer:
The blood pressure is increased to pump more blood to distribute more oxygen to the muscles
Explanation:
When we do activities that demand heavy exercise like running, our body needs more oxygen to carry out property the exercise. Oxygen is transported to muscles by the circulatory system (principally blood), our heart starts to pump faster the blood ( increase the blood pressure) to distribute the oxygen between muscles, consequently, we start to breathe faster to increase the oxygen intake.
46 Cromosomas
Las células del ser humano tienen 23 pares de cromosomas, 22 pares de autosomas y un par de cromosomas sexuales. Por tanto, cada individuo tiene 46 cromosomas en sus células. Por lo tanto, el número de cromosomas presentes en una célula nerviosa de un ser humano es de 46 cromosomas.
