The active transport of solutes out of the blood and into the tubular fluid is called

Lipophilic hormones bind to ___________ receptors of target cells.

When our brains process visual information about objects directly in front of us, they are able to use information that compares signals from the two eyes (steroscopic vision) in order to provide

The “dark current” of photoreceptors refers to

Intracellular signaling pathways within target cells are organized such that

Drinking a liter of water will cause the osmolarity of blood plasma to

Which photoreceptor cells function in dim light?

A comparison of the two major body fluid compartments reveals that

Compared to young adults, the elderly usually have ______ levels of circulating growth hormone and _____ levels of circulating sex hormones.

 This figure shows a frontal section of the kidney. Which number(s) indicate a renal papilla?