Answer the following questions true (T) or false (F)
1. The framework of the spleen is created by a network of reticular fibers made by reticular cells.
2. Adaptive, or specific, immunity consists of antimicrobial proteins and certain cells that respond quickly to pathogens within the first 12 hours after exposure.
3. Immunological memory can be formed by exposure to an antigen which is remembered by specific leukocytes and circulating antibodies.
1. TRUE
2. FALSE
3. TRUE
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Which is true of sex hormones?
A. They stimulate ossification of the epiphyseal plates. B. Their action on bone growth is stronger in males than in females. C. They have no effect on bone. D. They inhibit osteoblast activity.
The reflex movement of the head toward a loud noise is directed by the mesencephalon. Which nuclei accomplish this?
A) substantia nigra B) red nuclei C) tectum D) superior colliculi E) inferior colliculi
The endothelium of the glomerulus is made up of _________ capillaries
A. fenestrated B. continuous
Which one of the following is an anterior specialization of the choroid layer?
a. aqueous humor b. ciliary body c. cornea d. lens e. retina