Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive
Indicate whether this statement is true or false.
TRUE
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Explain what a concentration gradient is and how it assists a cell in doing its work.
What will be an ideal response?
Fats are a source of dietary fiber
Indicate whether the statement is true or false
The presence of food in the stomach triggers the release of a hormone that stimulates contraction of the pyloric sphincter. Specifically, these events involve release of
A. chyle in the secretory phase of digestion B. lipase in the intestinal phase of digestion. C. secretin in the cephalic phase of digestion. D. CCK in the intestinal phase of digestion. E. gastrin in the gastric phase of digestion.
The ability to develop increasing levels of force in an intact muscle composed of both fast and slow twitch muscle fibers typically involves:
A. recruitment of slow twitch muscle fibers before fast twitch muscle fibers B. tetany of fast twitch muscle at lower stimulus frequencies than slow twitch muscle C. a progressive recruitment of more muscle fibers within a given motor unit D. a progressive increase in the amplitude of the intracellular Ca++ transient E. a progressive decrease in the threshold for an action potential in the skeletal muscle