Answer: Receptor proteins
Why?
Cells have proteins called receptors that bind to signaling molecules and initiate a physiological response. Different receptors are specific for different molecules. Dopamine receptors bind dopamine, insulin receptors bind insulin, nerve growth factor receptors bind nerve growth factor, and so on.
this is the metric length system:
nanometer, micrometer, millimeter, centimeter, decimeter, meter, kilometer.
hope this helps. btw is that lil uzi
Starlight travels through space by radiation which moves in waves at the speed of light, which is close to almost 300,000 kilometers per second. As space is vast and continuing to expand, the starlight that we see may have been travelling millions of years already, with the actually star already extinct.
Answer:
To stay inflated, the lungs rely on a vacuum inside the chest. The diaphragm is a sheet of muscle slung underneath the lungs. When we breathe, the diaphragm contracts and relaxes. This change in air pressure means that air is 'sucked' into the lungs on inhalation and 'pushed' out of the lungs on exhalation.Explanation: hope this helps
The basic repeating unit of nucleic acids are known as nucleotides. A nucleotide consists of three distinct chemical groups, a 5-carbon sugar (ribose or deoxyribose), a nitrogen-rich base - (cytosine (C), guanine (G), adenine (A), thymine (T) in DNA or uracil (U) instead of T (in RNA), and phosphate.