Which of the following is NOT part of the intrinsic conduction system of the heart?
A) sinoatrial (SA) node
B) atrioventricular (AV) node
C) bundle branches
D) atrioventricular (AV) valve
D
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In polypeptides, what type of bond holds amino acids together?
a. hemoglobin b. protein bonds c. peptide bonds d. hydrogen bonds e. enzymes
The peritubular capillaries
a. supply nutrients and O2 to the tubular cells. b. take up the substances that are reabsorbed by the tubules. c. supply substances that are secreted by the tubules. d. all of these answers. e. none of these answers.
Hematopoiesis refers to the formation of blood cells within the red
marrow cavities of certain bones. True False
Mendelian inheritance specifies that if two heterozygous individuals mate, the chances that a child would be homozygous for the recessive allele would be
A. 50%. B. 25%. C. 75%. D. impossible to predict.