Some of these receptors bind to antigens in the blood. The
antigen are then endocytosed and identified. Some of the receptors such as the MHC II are
used in antigen-presentation. They display the antigen for identification and
activation of other lymphocytes.
True, they feel like they can answer with ok or mhm or even yeah during a conversation. Taking a break from social media but it’s sometimes needed. During Christmas, birthdays, weddings or any other special occasion I try to limit myself to a certain time on social media.
Answer:
so the bigger image is lungs and the smaller image im pretty sure thats air sacs? but u might need to do a little more resesarch if im wrong then please correct me in the comments
Explanation:
Answer:
Facilitated diffusion in a cell has a limited amount of carrier and channel proteins, wherein if all are being used or saturated, can't transport the substances outside in to the cell, leading to the plateau of the substance.
Explanation:
In <u>low concentrations</u> of the substance outside the cell, <u>facilitated diffusion behaves like simple diffusion</u>, carriers and channels are not all used up. But in instances of <u>high concentration of the substance</u> outside the cell, <u>all the carrier and channel proteins are occupied</u> with the said substance. So <u>even if we increase the concentration of the substance, it will not increase the rate of diffusion.</u>
Answer:
look left maybe right or out
