Chemotherapy Biotherapy Certification ONS Practice Testq

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the ONS Chemotherapy Biotherapy Certification Exam. Leverage flashcards and multiple choice questions, complete with hints and explanations. Equip yourself for exam success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What are the roles of chemical barriers in the immune system?

To produce blood cells
To engulf pathogens
To destroy foreign invaders
To prevent pathogen entry

The correct answer is: To prevent pathogen entry

Chemical barriers play a crucial role in the immune system by acting as the first line of defense against pathogens. These barriers include substances like enzymes in saliva and gastric acid in the stomach, which create an inhospitable environment for harmful microorganisms. For example, the acidic pH of stomach contents can kill many pathogens that enter with food, while enzymes in bodily secretions can degrade microbial cell walls. By preventing pathogens from entering the body, chemical barriers reduce the likelihood of infection and contribute to overall immunity. This proactive defense mechanism is essential for maintaining health and preventing disease, as it limits the opportunities for pathogens to invade tissues and multiply. Hence, the primary function highlighted in the correct answer is a vital aspect of the immune system's protective strategy.