Proteins are also able to act as messengers, taking messages from one part of our body to another. One example of this is insulin , which is a protein that's able to lower our blood sugar. When it's released from our pancreas by other signals, it sends signals to our cells to take in more glucose, which decreases our blood sugar. Human growth hormone is another protein that can act as messenger. After it's released from the pituitary gland, it can travel around our bodies, bringing the messages to grow or reproduce to other cells.
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