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

Which one of the following is NOT a characteristic of the endocrine system?

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

The parts of the vascular tunic include the

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

The space between the iris and the cornea is the

Arrange the following list of levels of organization from the smallest level to the largest level. i. tissue ii. cell iii. organ iv. organelle v. organism vi. organ system

The cartilaginous structure that surrounds the external auditory meatus is the

Sensory receptors in the inner ear are located in the

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