Swallowing consists of both a voluntary phase and a reflex action.
Answer the following statement true (T) or false (F)
True
Swallowing has a voluntary phase. However, once food or drink is pushed back far enough, swallowing becomes a reflex action.
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Because of its antiparallel nature, DNA is often referred to as a ________.
Fill in the blank(s) with the appropriate word(s).
Carbon fixation carried out by the prokaryotes known as the __________ involves chlorophyll a.
Fill in the blank(s) with the appropriate word(s).
Select all correct descriptions of the liver.
a. largest glad in body b. removes poisonous substances from the blood c. composed of a large of function units called lobules d. receives blood from the GI tract
Propose a valid reason to explain why is it critical that the K+ channel activation gate responds slightly slower to depolarization than the Na+ channel activation gate.
A. If both gates showed identical response times, movements of Na+ and K+ ions would magnify each other's effects on membrane potential changes, creating dangerously large action potentials. B. The conformational change in one gate is necessary to trigger the activation of the other. C. It is not critical and there would be no change in action potential characteristics if this difference in response time did not exist. D. If both gates showed identical response times, movements of Na+ and K+ ions would cancel out each other's effects on membrane potential changes.