What is the net movement of substances to regions of lower concentration called?  

A.  Osmosis
B.  Active transport
C.  Facilitation
D.  Diffusion


D.  Diffusion

Biology & Microbiology

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Large blood vessels that supply the spongy tissue of

the penis are __________ in an unaroused male. a. vasodilated b. vasoconstricted c. secreting prostaglandins d. volume reservoirs e. inhibiting testosterone secretion

Biology & Microbiology

RNA nucleotides are linked by the enzyme _____________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

This group of proteins can actually punch holes in pathogenic cells

A) complement system B) histamines C) fibrinogens D) interleukin I

Biology & Microbiology

The thread of DNA between nucleosomes is called _____________ DNA

a. nonhistone b. core c. insulator d. linker e. hypersensitive

Biology & Microbiology