The secondary oocyte normally has a diploid chromosome number
Indicate whether the statement is true or false
F
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How does the liver function as a part of the excretory system?
A. By removing salts, lactic acid, and urea B. By removing nitrogenous wastes C. By removing carbon dioxide D. By removing bilirubin
All of the following are true of neurons except that
A) they cannot divide. B) they conduct a nervous impulse. C) they are composed of a cell body and axon. D) they are a very specialized form of connective tissue. E) they receive information from other neurons through their dendrites.
Which of the following is often called the pacemaker of the heart?
A) Purkinje fibers B) sinoatrial (SA) node C) atrioventricular (AV) bundle (bundle of His) D) atrioventricular (AV) node
Concerning heart sounds, which of the following is correct?
A. The first heart sound occurs at the beginning of ventricular diastole. B. The first heart sound occurs at the beginning of ventricular systole. C. The second heart sound is heard when the AV valves are closing. D. The second heart sound occurs when blood flows into the superior vena cava. E. The first heart sound is the sound of the semilunar valves closing.