The papillary constrictor and dilator muscles help to

The adrenals, pancreas, thyroid, and parathryoids are glands of the endocrine system.

In general, the nervous system does each of the following, EXCEPT

Most postganglionic sympathetic terminals release _____ and generally the effect is excitatory.

The thoracic cavity is separated from the abdominopelvic cavity by the diaphragm.

There is/are __________ type(s) of cones and __________ type(s) of rods.

The space between the iris and the cornea is the

Which of the following statements about neural tissue is false? [Hint]

The highest concentration of cones occurs in the

The fluid occupying the space between the membraneous labyrinth and the bony labyrinth is the