It tends to act as a upper when it is truly a downer
The correct answer is the BBB.
The BBB is the blood brain barrier and alcohol is able to cross this barrier and reach brain cells which has negative effects on the body. Once alcohol reaches the brain cells it attacks them and as a result the central nervous system (CNS) is affected and changes in cognition and coordination take place.
Larry is taking a walk in the park. The pollen in the air makes him sneeze constantly. The line of defense that is his immune system exhibiting is that of "(A) first line of defense." There are only 3 lines of defense in the immune system. The first line of defense <span>are a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. In this case, it is the nasal cavity</span>
