During quiet breathing, inspiration involves:

A. muscular contractions and expiration is passive.
B. only the internal intercostal muscles contract.
C. inspiration is passive and expiration involves muscular contractions.
D. both inspiration and expiration are passive.
E. both inspiration and expiration involve muscular contractions.

inspiration involves muscular contractions and expiration is passive.

Explanation: Quiet breathing can be defined as a process of moving air into and out of the lungs to facilitate gas exchange with the internal environment that occurs at rest and does not require the cognitive thought of the individual. Here, expiration employs only the elastic recoil of the lungs. Inspiration involves muscular contractions (the diaphragm contracts, causing the diaphragm to flatten and drop towards the abdominal cavity).

explanation:

for example, code 28039 - excision, tumor, soft tissue of foot or toe, subcutaneous, 1.5 cm or greater, appears before 28043 - excision, tumor, soft tissue of foot or toe, subcutaneous; less than 1.5 cm.

answer: no, they are not.*

although rubber bands that contain excessive amounts of dye, toxins, or additives are sometimes toxic, most rubber bands do not cause any health issues. since they are typically made of latex, (a natural substance that is extracted from trees) they are not dangerous in any way if you chew them or accidentally ingest a piece of rubber band. however, chewing rubber bands does pose a choking hazard and is not a good habit to have.

*depending on the type of rubber band. the typical rubber bands that you see at stores are not toxic, but other types of rubber or latex that contains certain chemicals may be unhealthy and hazardous.