When ventricles are full of blood, which valves
are closed?
a. atrioventricular
b. aortic
c. pulmonary
d. aortic and pulmonary
e. all of these valves are closed
A
You might also like to view...
Leeches belong to the phylum
a. Arthropoda. b. Mollusca. c. Annelida. d. Cnidaria.
Which reaction below produces a salt?
A. KOH + H2O ® K+ + OH- + H2O B. HC2H3O2 + H2O ® C2H3O2- + H+ + H2O C. HCl + NaOH ® NaCl + H2O D. C6H12O6 + C6H12O6 ® C12H22O11 + H2O
Please order the following choices to reflect the generalized anatomy of bacterial cells with "1" being the innermost cell component and "4" being the outermost cell component.
> Glycocalyx > Cell membrane > Cell wall > Cytoplasmic matrix
The development of antiviral drug therapy is difficult because
A. viruses are obligate intracellular parasites so the host cell can be harmed by the drug. B. viruses do not have specific replication cycles that can be targeted. C. viruses do not contain genetic material. D. their life cycles do not have distinctive stages.