PBS

An infected individual coughs into the air, then an uninfected individual inhales the particles, acquiring the pathogen. This form of disease transmission is an example of:

• Direct Contact

• Indirect Contact

• Droplet Transmission

• Vector Transmission

When infectious pathogens enters the body, white blood cells (B-cells), produce THESE molecules to attack or impair the pathogens:

• Antigens

• Antibodies

• Toxins

• Vaccines

Vaccinations are an example of:

• Innate immunity

• Acquired immunity

These components of our innate, or nonspecific, immune system are found in our nose, trachea, and lungs and work with mucus to trap foreign invaders:

• Digestive Enzymes

• Secretions

• Cilia

• Phagocytes

These components of our innate, or nonspecific, immune system are found in digestive tract and on our skin to prevent foreign invaders from attaching.

• Normal flora

• Secretions

• Cilia

• Phagocytes

Using a "Head Tilt" as part of CPR helps ....

• You hear and see if a person is breathing.

• You see if something is lodged in the throat.

• You breath easier.

• Open the air way for more effective "Rescue Breaths"

• All of the above

A ____________ is something in the environment or something about a person's actions that can cause harm or injury.

• Hazard

• Emergency

• Accident 

• Concussion

Tags

NGSS.MS-ESS3-2

PBS is commonly used in laboratories as a buffer solution. What does PBS stand for?

• Phosphate Buffered Saline

• Potassium Buffered Solution

• Phosphorus Buffer System

• Protein Binding Solution

Which of the following is a primary use of PBS in biological experiments?

• To stain cells

• To fix tissues

• To maintain pH balance

• To enhance fluorescence

PBS is often used in cell culture. What is its main role in this context?

• To provide nutrients

• To act as a growth factor

• To wash cells and remove excess serum

• To increase cell proliferation