[02] Control of Hormonal Secretion Flashcards
How is hormonal secretion generally controlled?
Through feedback loops
What are feedback loops?
Systems where the output affects the input
What are the two main types of feedback loops in hormonal control?
- Negative feedback loops
- Positive feedback loops
What is a negative feedback loop in hormonal control?
A process where the product inhibits its own production
What is a positive feedback loop in hormonal control?
A process where the product enhances its own production
Can you provide an example of a negative feedback loop in hormonal control?
The regulation of thyroid hormone
Can you provide an example of a positive feedback loop in hormonal control?
The release of oxytocin during childbirth
How does the hypothalamus control hormonal secretion?
It releases releasing and inhibiting hormones
What is the role of releasing hormones from the hypothalamus?
They stimulate the anterior pituitary to secrete hormones
What is the role of inhibiting hormones from the hypothalamus?
They prevent the anterior pituitary from secreting hormones
Which gland acts as the link between the nervous and endocrine systems?
The hypothalamus
What is the role of the pituitary gland in hormonal secretion?
It secretes a variety of hormones that control other endocrine glands
What is the anterior pituitary gland?
A part of the pituitary gland that secretes hormones like growth hormone, thyroid-stimulating hormone, and others
What is the posterior pituitary gland?
A part of the pituitary gland that stores and releases hormones produced in the hypothalamus
What hormones are stored and released by the posterior pituitary gland?
- Oxytocin
- Antidiuretic hormone
