What is the primary mechanism for deposition of large, high-mass particles (>5 µm) in the respir-atory tract?
a. Inertial impaction
b. Sedimentation
c. Diffusion
d. Brownian motion
ANS: A
Inertial impaction occurs when suspended particles in motion collide with and are deposited on a surface. This is the primary deposition mechanism for particles larger than 5 µm.
You might also like to view...
________ Pediatrics is the branch of medicine dealing with the care and development of children and the diagnosis and treatment of childhood illnesses
Indicate whether the statement is true or false
What is the risk of reporting an incorrect concentration for a patient sample?
A) Administration of an inappropriate drug B) Misdiagnosis of an illness C) Both of the above D) Neither of the above
SCENARIOUse this scenario to answer the following question(s).Your patient is a woman who is in her 38th week of pregnancy. She started having contractions while at her job, and her employer called 911.Based on the fact that the mother is in her 38th week of pregnancy, you understand that this pregnancy is:
A. full term. B. high risk. C. an emergency. D. in the second trimester.
If the feeding tube is surgically inserted into the stomach, it is called a(n):
A) jejunal tube. B) gastric tube. C) AV graft. D) AV fistula.