Receptor receives chemical signals came from the cell's outside environment. It is made up of protein molecule. The correct answer for the question above is letter a. Receptor protein allows one or <span>a few specific molecules to pass across the membrane.</span>
Answer:
There is sugar on the pig's surface that humans don't have.
Explanation:
"This rapid rejection occurs when human antibodies attach to sugar molecules on the surface of the transplanted pig organ's cells."
<span>This system overlaps the above CNS and PNS and include neurons to provide sense information to the brain and motor neurons to drive muscles and glands. This system thus provides the interface between the outside world and the brain.</span>
The answer is D homeostasis. For A, hemoglobin is a protein exists in blood and can bring oxygen. For B, photosynthesis is a process of converting CO2 to glucose using the energy of light. It occurs in chloroplast. For C, hypothesis means suppose.
Answer:
c
Explanation:
Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick. Different viruses attack certain cells in your body such as your liver, respiratory system, or blood.
