19) blood from the brain is drained by the ________.
20) ________ form elaborate networks within tissues that allow very slow blood flow.
(note: be sure to capitalize the first letter of your answer).
21) ________, or pinkeye, results from damage to or irritation of the conjunctival
surface. (note: be sure to capitalize the first letter of your answer).
22) the endocrine system regulates physiological processes through the binding of
hormones to ________ on target cells.
23) the property of heart muscle to contract in the absence of neural or hormonal
stimulation is called ________.
24) analysis of a glandular secretion indicates that it contains some dna, rna, and
membrane components such as phospholipids. what kind of secretion is this and why?
25) indicate an advantage for having simple rather than stratified epithelium lining the