Question
At each step of the signaling cascade, there is the possibility of ____.
Answer
At each step of the signaling cascade, there is the possibility of amplification.
Note: For example, one hormone molecule may bind to multiple receptors before it is degraded. Also, each receptor may activate multiple enzymes, each of which will trigger the production of large quantities of second messengers. Thus, each step can result in an increase in signal intensity.
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Endocrine signaling involves the secretion of hormones ____
Endocrine signaling involves the secretion of ____ directly into the bloodstream.
Hormones bind to target receptors and ____
____ hormones are composed of amino acids.
Peptide hormones are composed of ____.
____ are signaling molecules that are secreted directly into the bloodstream to distant target tissues.