Bile is produced in the and stored in the until it is needed.
a. pancreas . . gallbladder
b. stomach . . small intestines
c. gallbladder . . pancreas
d. liver . . gallbladder

The correct answer for the blank is-

d. liver . . . gallbladder.

Bile is a dark green to yellowish brown colored digestive fluid that is produced in the liver ( by hepatocytes) and stored in the gallbladder until it is required by the digestive system.

It helps in the digestion ( particularly in the duodenum region of small intestine) and absorption of fats in the small intestine.

Thus, option d) is the right answer.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

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