Select the correct statement about the regulation of gastric secretion.
a) vagus stimulation of the stomach results in decreased secretion of gastric juice.
b) the presence of food in the stomach prevents hormonal control of gastric secretion.
c) gastric secretion can be stimulated before food has entered the mouth.
d) gastric secretion is enhanced by very low ph (below a ph of 2).

oceans

indian ocean

pacific ocean

atlantic ocean

arctic ocean

southern ocean

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.