Respond to the following statements in reference to the four structures of the heart listed below.
A. Blood from the superior and inferior vena cava enters the heart via this structure.
B. Oxygenated blood enters the heart via this structure.
C. Blood is pumped to the majority of the body by this structure.
D. Blood passes to the lungs from this structure.
E. Deoxygenated blood exits the heart from this structure.
A. right atrium
B. left atrium
C. left ventricle
D. right ventricle
E. right ventricle
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If 1000 millimoles make up a mole, how many grams of magnesium (Mg), which has an atomic mass of 24.305, will make a solution that contains 150 µmol of Mg?
A. 3.6mg. B. 2.4mg. C. 0.24mg. D. 36mg.
The evolution of genetically based, reciprocal adaptations in two or more interacting species is called ____
a. commensalism b. coevolution c. mutualism d. parasitism e. predation
Which hormone results in the production of more neurons in the higher vocal center of the brains of male, but not
female, zebra finches?
a. testosterone b. estrogen c. octopamine d. epinephrine e. androgen
Which is the proper order of the components of the electrical activity of the heart?
a. AV node ? Purkinje fibers ? SA node b. AV node ? SA node ? Purkinje fibers c. Purkinje fibers ? AV node ? SA node d. Purkinje fibers ? SA node ? AV node e. SA node ? AV node ? Purkinje fibers