Final answer:
The kidney secretes Calcitriol and Erythropoietin, whereas the Small Intestine secretes Cholecystokinin and Secretin. The Stomach and Adipose tissue are not matched with any hormones in this specific question.
Step-by-step explanation:
To match the hormones to the secondary endocrine structures that secrete them:
- Kidney: A. Calcitriol and B. Erythropoietin
- Small Intestine: C. Cholecystokinin and D. Secretin
- Stomach: Not applicable in this question.
- Adipose: Not applicable in this question.
The kidney produces two important hormones: Calcitriol, which is the active form of vitamin D, and Erythropoietin, which stimulates the production of red blood cells.
The small intestine secretes hormones that play key roles in digestion. Cholecystokinin stimulates the release of digestive enzymes and bile from the pancreas and gallbladder, while Secretin stimulates the secretion of bicarbonate-rich fluids from the pancreas and liver.