NSCI 280 Week 7 – Animations: The Endocrine SystemUniversity of Phoenix Material
Animations: The Endocrine System
Hypothalamus and Pituitary Gland
After viewing the animation, answer these questions:
The hypothalamus is sometimes referred to as the . Why
Where in the brain is the hypothalamus located
Describe the structure of the hypothalamus.
What is the infundibulum What is its function
Where is the pituitary gland located How is it divided
What is another name for the anterior pituitary How is it connected to the hypothalamus
What travels along this pathway What is their function
What is another name for the posterior pituitary How is it connected to the hypothalamus
What travels along this pathway How are they transported What is their destination
Name the two classes of hypothalamic hormones that regulate the anterior pituitary. How do they reach the anterior pituitary What is their function
How do anterior pituitary hormones arrive at their target tissues
Describe an example of these hormones and their function.
Name the hormones produced by the posterior pituitary. What is the source of posterior pituitary hormones
Name two posterior pituitary hormones. How do they arrive at the posterior pituitary
Name the structures that store the posterior pituitary hormones. What causes their release Where are they released
Name the functions of each posterior pituitary hormone.
Hormonal Communication
After viewing the animation, answer these questions:
In general, how does hormonal communication begin What reaction then occurs
How are hormones transported to target cells
What occurs when the hormones arrive at their target cells
What then triggers changes in the target cells
Intracellular Receptor Model
After viewing the animation, answer these questions:
Describe aldosterone, the hormone used in the animation.
What does aldosterone bind with in the cytoplasm of the cell
Where does the aldosterone-receptor complex go, and where does it bind
This binding stimulates the synthesis of what molecule What is the function of this molecule
Where does this mRNA molecule go, and what does it do
What is directed by this binding
Receptors and G Proteins
Second Messengers: The cAMP & Ca2+ Pathways
After viewing the animation, answer these questions:
What is located on the membrane-bound receptor on the outside of the cell
What is a ligand
To what does the portion of the membrane-bound receptor on the inside of the cell bind
What are the three subunits of this protein What is attached to the alpha subunit
What changes occur in the G protein when the ligand binds to the receptor site What changes occur to the alpha subunit
What now occurs with the activated alpha subunit How long can this step be repeated
What occurs when the ligand separates from the receptor site
How is the alpha subunit inactivated
What occurs with the G protein subunits after this inactivation
After viewing the animation, answer these questions:
How do second messengers effect changes inside of cells
The signal molecule is referred to as the messenger.
What molecule is activated by the binding of the signal molecule to its receptor
Typically, the G protein activates .
Some second messenger systems involve activating .
The other type of second messenger system involves ions.
Whether triggering phosphorylation or the release of Ca2+, second messenger systems
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