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NSCI 280 Week 7 – Animations: The Endocrine System

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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