Which endocrine gland has both an anterior and a posterior lobe?
The pituitary gland has two parts—the anterior lobe and posterior lobe—that have two very separate functions.
Which gland is divided into anterior and posterior lobes?
the pituitary gland
Which gland is connected to the pituitary gland by the Infundibulum?
hypothalamus
Which gland is connected to the pituitary gland by the Infundibulum quizlet?
The pituitary gland is connected to the hypothalamus by the infundibulum or pituitary stalk, containing axons from neurons in the hypothalamus and small blood vessels. The axons run to the posterior pituitary gland.
What hormones are released by the posterior pituitary?
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. Vasopressin is also known as antidiuretic hormone (ADH).
What is the connection between the hypothalamus and pituitary gland?
The hypothalamus links the nervous and endocrine systems by way of the pituitary gland. Its function is to secrete releasing hormones and inhibiting hormones that stimulate or inhibit (like their names imply) production of hormones in the anterior pituitary.
What are two benefits of having a portal vascular system to connect the hypothalamus with the anterior pituitary gland?
Its main function is to quickly transport and exchange hormones between the hypothalamus arcuate nucleus and anterior pituitary gland. The capillaries in the portal system are fenestrated (have many small channels with high vascular permeability) which allows a rapid exchange between the hypothalamus and the pituitary.
How does the hypothalamus control the release of hormones from the posterior pituitary gland?
There are two sets of nerve cells in the hypothalamus that produce hormones. One set sends the hormones they produce down through the pituitary stalk to the posterior lobe of the pituitary gland where these hormones are released directly into the bloodstream. These hormones are anti-diuretic hormone and oxytocin.
Which organ do pituitary hormones most directly affect?
The group of hormones that have a direct effect includes: Growth hormone (GH), also called somatotropic hormone (STH): has an effect in many parts of the body – particularly the liver, bones, fat tissue and muscle tissue.
Why posterior pituitary hormones are neurohormones?
The neurohormones released by the axons of the hypophysiotropic area of the hypothalamus can either increase or decrease the synthesis and secretion of hormones of the adenohypophysis. When a neurohormone increases output of a particular adenohypophysial hormone, it is called a releasing hormone (RH).
Is the posterior pituitary a true endocrine gland?
The pituitary gland, or hypophysis, is an endocrine gland about the size of a pea. The posterior pituitary does not produce any hormones of its own; instead, it stores and secretes two hormones made in the hypothalamus.
Does the posterior pituitary produce hormones?
The posterior pituitary gland is actually part of the brain and it secretes hormones directly into the bloodstream under the command of the brain.
What does the posterior pituitary do?
The primary function of the posterior pituitary is the transmission of hormones originating from neurons located in hypothalamic brain regions such as the supraoptic nucleus (SON) and paraventricular nucleus (PVN) for secretion directly into peripheral circulation.
What would happen if there was damage to the posterior pituitary?
Posterior pituitary injury results in loss of hypothalamic control of Antidiuretic Hormone (ADH) release. This can result in: Excess release or Syndrome of Inappropriate Antidiuretic Hormone (SIADH) with low sodium levels (hyponatraemia).
Which of the following is the posterior pituitary in charge of?
The posterior pituitary secretes two peptide hormones, namely, arginine vasopressin (AVP), formerly called ADH (antidiuretic hormone), and oxytocin. Both hormones are synthesized by the cell bodies of the supraoptic and paraventricular nuclei in the hypothalamus.