Complete the following statements about the functions of the digestive system. The
starts an involuntary swallowing action when it senses food.
The
squeezes food down the
digestive tract by an involuntary synchronized muscle movement called
.
Food that has been digested in the
is processed into a thick liquid called

List two modern organisms that have pentameral symmetry

Plz ! ive been stuck on this forever

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed