You suspect that a newly discovered bacterial secretion system identified in an E. coli strain isolated from a recent outbreak is important for secreting a particular protein toxin that is important for virulence. How would you most directly test this hypothesis

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

"a.) well–developed vascular system."

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic