The electrical signal that causes the heart to contract is initiated by the:

Identify this area of this gland: :

These arteries that branch off the aortic arch supply blood to the right and left hemispheres of the brain:

Identify this connection:

Increasing levels of this hormone are responsible for childbirth:

As blood travels through the adrenal cortex, the level of K+ is monitored.  If it is elevated, aldosterone will be released to correct it.  This is an example of _______________ stimulation.

This hormone causes ovulation in the female:

Identify this gland and lobe:

Michael has not eaten for several hours.  His blood glucose level is decreasing.  Which hormone will be released to maintain homeostasis:

Identify this valve: :