Hormone secretion in mammals is under the control to ............

Explanation

To answer the question "Hormone secretion in mammals is under the control of __________," we need to understand the role of various glands in the endocrine system of mammals.

### Step-by-Step Solution:

1. **Understanding Hormones**: Hormones are chemical messengers that are secreted into the bloodstream and have effects on various organs and tissues in the body.

2. **Identifying the Glands**: In mammals, hormones are primarily secreted by specialized glands known as endocrine glands. These glands do not have ducts and release hormones directly into the bloodstream.

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