Building block molecules for biosynthetic pathways come from the cell's catabolic pathways and from the environment.
Answer the following statement true (T) or false (F)
True
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Which of the following is a type of cell communication where the signaling molecule is released by the same cell that responds to the signal?
A. juxtacrine B. paracrine C. autocrine D. endocrine E. All of these choices are correct.
In neurons, actin filaments are really intermediate filaments
a. true b. false
What is the blind spot?
A) A part of the cornea B) An area of the retina that has no receptor cells C) A space in the vitreous humor D) The part of the cerebral cortex that interprets action potentials from the eye E) The hole where there is no iris
All of the following structures contribute to the ability of pathogenic bacteria to cause disease, except
A. outer membrane of gram-negative cell walls. B. capsule. C. inclusions. D. fimbriae. E. slime layer.