Arrange the steps of the negative feedback system in the control of blood glucose in chronologic order. (Separate letters by a comma and space as follows: A, B, C, D):
a. Elevation of blood glucose
b. Decrease in blood glucose
c. Beta cells repressed
d. Beta cells of pancreas stimulated to excrete insulin
e. Intake of nutrients
ANS:
E, A, D, B, C
After the intake of food the blood glucose increases, which stimulates the beta cells of the pancreas to excrete insulin. Insulin decreases the blood glucose and the negative feedback system represses the beta cells of the pancreas.
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