Find the correctly matched pair.

Options

A. Pineal gland - doesn't influence menstrual cycle
B. Interstitial cells - erythropoietic
C. Corpus luteum - secretes oxytocin
D. Cholecystokinin - stimulates pancreatic enzyme secretions

Answer

To find the correctly matched pair from the options given, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option 1: Pineal gland does not influence menstrual cycle.**
- The pineal gland produces melatonin, which regulates circadian rhythms and can influence the menstrual cycle. Therefore, this statement is incorrect.

2. **Option 2: Intestinal cells are erythropoietic.**
- Intestinal cells, specifically the interstitial cells (Leydig cells), are primarily responsible for producing testosterone, not for erythropoiesis (the production of red blood cells). Thus, this statement is also incorrect.

3. **Option 3: Corpus luteum secretes oxytocin.**
- The corpus luteum primarily secretes progesterone and some estrogen, which are essential for maintaining pregnancy. Oxytocin is secreted by the posterior pituitary gland, not the corpus luteum. Therefore, this statement is incorrect as well.

4. **Option 4: Cholecystokinin stimulates pancreatic enzyme secretion.**
- Cholecystokinin (CCK) is a hormone secreted by the duodenum that stimulates the pancreas to release digestive enzymes. This statement is correct.

### Conclusion:
The correctly matched pair is **Option 4: Cholecystokinin stimulates pancreatic enzyme secretion.**

---