Answer: B. They allow for specific substance to travel throughout the cell.
Explanation: I know this because carrier proteins and channel proteins are some types of embedded proteins.
Answer:
There are milder winters in the west and colder winters in the east
The different barriers that you have to go through are the different organs of the immune system. These are the lymphoid organs, thymus, and bone marrow. The secondary wall that you have to go through are the lymphatic tissues which include the lymph nodes, adenoids, skin, liver, tonsils, spleen, and the lymph vessels.
At all times, these systems work hand-in-hand so that the body can protect itself in order for it to survive
<span>The homeostatic regulation prevents potentially disruptive changes in the body's internal environment.</span>Compared to homeostatic regulation by the nervous system, homeostatic regulation by the endocrine system<span> is slow (minutes to days). The homeostatic regulation by the nervous system on the other hand is fast (within a second). </span>
