Which of the following is FALSE concerning ligands?

The “blind spot” corresponds to the ______ of the retina. 

What kind of a molecule is “transducin”?  

The first stage of sleep is called:

G-proteins bind:

If blood glucose levels are too low, this could be due to:

________ monitor body position.

___________ is a disease in which antibodies stimulate the thyroid.

Calcitonin is secreted by:

__________ are more light-sensitive (i.e., can be activated under lower-light conditions).