D. Glycocalyx, which is secreted by the epithelial cells, allows adherence of the mucus layer. Goblet cells secrete mucins which make up the mucus layer.

A. IgA is found in highest concentration in most bodily secretions. IgD is an antigen found on Beta Lymphocytes. IgE is involved with mast cells and allergic reactions. IgG is the most common immunoglobulin found in the vascular system. IgM is located in the blood and immature B lymphocytes

B. The superior cervical ganglion contains SYMPATHETIC synapses only.

D. The adrenal gland does not have a ganglion synapse with the ganglionic fibers of the spinal column. Rather, it receives a signal to release epinephrine directly into the bloodstream.

E. Tears are not a significant source of vitamin A or glucose. Tears provide oxygen and specific ions (K+, Ca2+, Mg2+, Zn2+, etc.). Tears also play a role as an optical surface, to flush foreign materials and as a lubricant for blinking.

C. All but Vitamin B are found in the tear film. Lysozymes serve as bacteriolytic cells. Defensins and IgA serve to detect foreign material and cells. Lactoferrin protects the eye from free radical iron molecules.

C. The glycocalyx is found on the APICAL portion of the microvilli of the cornea. The glycocalyx is responsible for keeping the mucin layer adhered to the corneal surface.

D. New basal cells originate from stem cells located at limbus. Basal cells migrate to the center of the cornea where they divide and become wing cells. These wing cells move to the surface and eventually slough off as surface cells.

B. The long ciliary nerves of the cornea are branches of the ophthalmic division of the trigeminal nerves (CN V). The nerves enter into the cornea and traverse about ⅔ of the distance before moving anteriorly. These nerves loes myelin sheath about 1.5mm into the cornea.

C. Active secretion is responsible for 80-90% of aqueous humor production. A small portion of aqueous is produced through diffusion and ultrafiltration. Hydration and holocrine are both distractors.

B. This is an example of active secretion.

A,B,C. All of these options will influence pars plicata to produce more aqueous humor. Build up of H+ in pigmented epithelium leads to reversal of bicarbonate ion movement, thus halting aqueous production. A similar mechanism can be seen with increased intracellular Cl- ions.