Goal of 1st line of defense: to prevent pathogen from entering body
There are physical and chemical barriers where all exposed body entrances would be. Ex. Skin, mouth, eyes, nostrils.
-The skin: composed of tough dead cells that are constantly shedding- physical barrier bc it prevents pathogen from latching on. Skin also contains sweat and oil glands that secrete acids and oils that prevent the growth of pathogens- chemical barrier. Also, sweat contains lysozyme.
Saliva and tears: protect the mouth and the eyes from pathogen invasion. Saliva and tears contain lysozyme.
Nostrils, digestive + respiratory tracts lined with another barrier: mucous.
I would go with B. A friend needs to empathize and show that they care about your feelings.
As for A, a friend does not need to always agree withe every single thing you say. Everyone has their different opinions and feelings about certain things. Let's say you like a certain food. Maybe your friend doesn't agree and actually dislikes that food, but both of you are still friends despite the fact that you do not agree about the food.
For C, a friend should always be honest. Of course, they should not be so blunt as to hurt your feelings very badly, but they should tell you what they truly think, but in a polite and civil way, of course.
For D, they are not reliable if they are only like that when they are in a good mood. Even if they are upset with you, that does not give them the right to give out any secrets or any private information that you have shared with them.
So, in conclusion, B: Empathizes by showing care and sensitivity to your feelings, is the best option.
I hope I helped! :D
Answer:
When you exercise, your body releases chemicals called endorphins. These endorphins interact with the receptors in your brain that reduce your perception of pain. Endorphins also trigger a positive feeling in the body, similar to that of morphine. your welcome
