Anatomical and physiological barriers provide the crucial first line of defense against pathogens. These barriers include intact skin, vigorous mucociliary clearance mechanisms, low stomach pH and bacteriolytic lysozyme in tears, saliva and other secretions.
Answer:
4ml
Explanation:
80 × 0.25 = 20
Patient will need 20mg/day;
There are 50mg in 10ml, and we the patient needs 20mg so we can use ratios;
50 : 10
20 : x
20/50 = x/10
x = 4ml
