What part of the pituitary gland releases oxytocin?
What part of the pituitary gland releases oxytocin?
The posterior lobe produces two hormones, vasopressin and oxytocin. These hormones are released when the hypothalamus sends messages to the pituitary gland through nerve cells.
What tissue does the pituitary gland target?
Overview of Hypothalamic and Pituitary Hormones
Hormone | Major target organ(s) | |
---|---|---|
Anterior Pituitary | Growth hormone | Liver, adipose tissue |
Thyroid-stimulating hormone | Thyroid gland | |
Adrenocorticotropic hormone | Adrenal gland (cortex) | |
Prolactin | Mammary gland |
Does the anterior pituitary store oxytocin?
Pituitary: Posterior Lobe (Neurohypophysis) While the anterior lobe shoulders most of the work in producing hormones, the posterior lobe stores and releases only two: oxytocin and antidiuretic hormone (ADH), or vasopressin. Secretes in response to uterine distention and stimulation of the nipples.
What tissue does oxytocin target?
Endocrine gland/ source of hormone | Hormone | Target organ or tissue |
---|---|---|
Anterior pituitary (adenohypophysis) | Prolactin | Mammary gland |
Posterior pituitary (neurohypophysis) | ADH (antidiuretic hormone) | Kidney tubules Smooth muscle in arterioles |
Oxytocin | Uterine smooth muscle Mammary gland | |
Pineal gland | Melatonin | Various tissues |
What is the target tissue of oxytocin?
Endocrine gland/ source of hormone | Hormone | Target organ or tissue |
---|---|---|
Posterior pituitary (neurohypophysis) | ADH (antidiuretic hormone) | Kidney tubules Smooth muscle in arterioles |
Oxytocin | Uterine smooth muscle Mammary gland | |
Pineal gland | Melatonin | Various tissues |
Thyroid | Thyroxine (T4) Triiodothyronine (T3) | Most tissues |
Which of the following organs contain target cells for oxytocin?
Mammary alveoli are surrounded by smooth muscle (myoepithelial) cells which are a prominant target cell for oxytocin. Oxytocin stimulates contraction of myoepithelial cells, causing milk to be ejected into the ducts and cisterns.
Where is oxytocin stored?
the posterior pituitary gland
Oxytocin in both sexes is produced by the hypothalamus and stored and secreted into the bloodstream from the posterior pituitary gland.
Where does oxytocin go?
Oxytocin is produced mainly in the hypothalamus, where it is either released into the blood via the pituitary gland, or to other parts of the brain and spinal cord, where it binds to oxytocin receptors to influence behavior and physiology.
What is the target tissue for ACTH?
the adrenal cortex
Hypothalamic-Pituitary Axis Corticotropin-releasing hormone (CRH) is released from the hypothalamus, which stimulates the anterior pituitary to release adrenocorticotropic hormone (ACTH). ACTH then acts on its target organ, the adrenal cortex.
What is the target organ for oxytocin?
Mammary gland
Endocrine gland/ source of hormone | Hormone | Target organ or tissue |
---|---|---|
Anterior pituitary (adenohypophysis) | Prolactin | Mammary gland |
Posterior pituitary (neurohypophysis) | ADH (antidiuretic hormone) | Kidney tubules Smooth muscle in arterioles |
Oxytocin | Uterine smooth muscle Mammary gland | |
Pineal gland | Melatonin | Various tissues |
Where is oxytocin made and what is its function?
Oxytocin is a natural hormone that manages key aspects of the female and male reproductive systems, including labor and delivery and lactation, as well as aspects of human behavior. Your hypothalamus makes oxytocin, but your posterior pituitary gland stores and releases it into your bloodstream.