Plasma from a sick mouse is filtered across a membrane that has a 200 nm pore size. if the filtrate is still infectious when injected into a healthy mouse, then the pathogen is most likely a(n):
-parasitic worm
-fungus
-virus
-bacterium
-archaean

Virus

Explanation:

Viruses are usually sized 5 - 300 nanometers, while other organisms are much bigger (bacteria 0.5 to 5 micrometers).

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.