1) a ________ is a single energy packet of visible light.
2) define the term transport maximum and describe a way cells can increase their
transport capacity.
3) the three types of gated channels are ________, ________, and ________.
4) ________ is a process by which an extracellular signal molecule, called the
________, activates a membrane receptor that in turn alters intracellular molecules,
called the ________, to create a response.
5) most long-distance communication between cells takes place through the ________
and ________ systems with their combination of chemical and electrical signals.
6) what general principle of hormone action does your answer support?
7) the primary complex carbohydrate ingested and digested by people is ________.
8) asynchronous activation of motor units is important because it functions to
________.
9) explain the differences among the terms paracrine, autocrine, hormone, and cytokine.
10) when epinephrine combines with alpha adrenergic receptors on smooth muscle in
intestinal blood vessels, the blood vessels ________; however, when epinephrine binds
to beta-2 adrenergic receptors on certain skeletal muscle blood vessels, the vessels
________.