Which of the following structures secretes antidiuretic hormone into the blood?

glomerulus
pituitary gland
kidney
hypothalamus

Which of the following is a common response to cell signaling?

Omg substrates with the same size and shape as the active site will bind to the enzyme. why is the key labeled the “bad” substrate?

Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?