The most metabolically active cells that produce keratin are located in the ______________.  The main function of keratin is to ________________.

Which of the following is NOT a true statement about hair or hair follicles?

Gristle covering the ends of bones is composed of this tissue, which is also found attached to most ribs:

This type of tissue lines the inside of the urinary bladder, which has to change size as urine is stored and later released.

Which is shed (sloughed off)?

Which best describes the difference between active and passive transport systems in cells?

The diffusion of water across a cell membrane is called:

Which of the four major types of tissues often functions as “filler” between linings or coverings and underlying muscular tissue?

In the kidneys, tiny tubes that function in urine formation have walls composed of a single layer of cube shaped cells.  What type of tissue does this describe?

Which of these is NOT a component of ground substance?