In general, the vessels that return blood to the heart in a closed circulatory system are referred to as

A. arteries.
B. veins.
C. capillaries.
D. sinuses.
E. auxiliary hearts.


B. veins.

Biology & Microbiology

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To grow roses commercially, which growing conditions would be optimal?

What will be an ideal response?

Biology & Microbiology

Biochemical evidence supporting the sliding filament model of muscle contraction includes the observation that

A) myosin light chains can be phosphorylated. B) titin connects each end of a thick filament to a Z line. C) TnC binds Ca2+. D) actin has polymerization ATPase activity. E) myosin has an ATP-dependent crossbridge cycle.

Biology & Microbiology

Which process used to solve problems in science involves accumulating facts through observation until the evidence leads to a general statement about nature?

A) deductive reasoning B) hypothesis C) inductive reasoning D) theory

Biology & Microbiology

The characteristic of the human immunodeficiency virus (HIV) that makes it different from other RNA viruses is that it ____________.

A. can synthesize mRNA from a double-stranded DNA template. B. inserts into the DNA of the host C. causes hepatitis D. can synthesize DNA from an RNA template

Biology & Microbiology