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

Taste buds sensitive to sourness are concentrated at the __________ of the tongue.

The lens focuses light on the photoreceptor cells by

________ is the study of life.