Gary, who is sick with a cold, sneezed on you during lunch. Determine which line of defense provides initial protection for you
What will be an ideal response?
The first line of defense, which includes surface barriers, protects you initially. Your skin and mucosae are surface barriers and provide a continuous physical block to entry of pathogens into the body. Keratin, oil (sebum), and mucus prevent invasion by pathogens.
You might also like to view...
The matrix of bone is formed in circular layers called ________.
A. lacunae B. canaliculi C. canals D. lamellae
Once inside the sympathetic trunk, the sympathetic preganglionic axons may/will
A. follow any of the routes listed. B. travel inferiorly. C. remain at the level of entry. D. travel superiorly.
Epinephrine and norepinephrine are secreted by the
A) Adrenal cortex. B) Chromaffin cells. C) Heart. D) Kidneys.
Describe the physiological (non-psychosocial) mechanisms that influence food intake. Include the following in your answer : CCK, NTS, ghrelin, PYY, insulin, leptin, NPY, melanocortins, orexins, and CRH
What will be an ideal response?