Answer:
CCK
Explanation:
Cholecystokinin (CCK) acts by generating gallbladder contractions and relaxing the Oddi sphincter together with the action of secretin (another hormone secreted by the gut) that stimulates bile production and decreases acid secretion in the stomach.
When stomach acid is high, it stimulates the secretion of another hormone, secretin, which causes decreased gastrointestinal motility. This has the effect of stopping the transfer of stomach contents to the duodenum, preventing the stomach from emptying too quickly. Secretin in conjunction with CCK will also act on the stomach glands, inhibiting acid secretion.
Proteins play the role of unwinding and separating a double-stranded DNA molecule.
The right answer is A. lens
The eye-lens is a natural convergent lens of the eye.
The eye has two natural convergent lenses: the cornea, located at the entrance of the eye, and the crystalline, biconvex lens located behind the iris and connected to the envelopes of the eye by the ciliary body. These two lenses focus the light rays on the retina, which acts as a screen in the back of the eye.
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