A muscle tissue that has no visible striations and has spindle shaped cells.

All of the following are true of epidermal ridges except that they

A) extend into the hypodermis. B) increase surface area and friction on fingertips. C) cause ridge patterns on the surface of the skin. D) produce patterns that are determined partially genetically. E) interconnect with the dermal papillae.

The superior olivary complex is involved in detecting the

A.  location of a sound. B.  brightness of a light. C.  flavor of a taste. D.  intensity of a smell. E.  texture of a touch stimulus.

Microglia are

A) specialized motor neurons in the peripheral nervous system. B) star-shaped cells that help form the blood-brain barrier. C) specialized macrophages of the CNS that mobilize in response to inflammation. D) found in choroid plexuses, and produce cerebrospinal fluid.

A substance that dissociates into cations and hydroxyl ions is:

a. an acid b. a base c. a salt d. water