A hair cycle consists of three developmental stages in which order?
A. Anagen, telogen, and catagen
B. Anagen, catagen, and telogen
C. Catagen, anagen, and telogen
D. Catagen, telogen, and anagen
E. Telogen, anagen, and catagen
B. Anagen, catagen, and telogen
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The major steps in oxidative phosphorylation include all of the following except
A) removal of hydrogen atoms from a substrate molecule by coenzymes. B) ionization of hydrogen atoms. C) decreasing the energy level of electrons passing through the electron transport chain. D) the breaking of carbon-carbon covalent bonds. E) the acceptance of electrons by oxygen atoms.
Polar R groups of closely positioned amino acids often enter into _________ with each other, which helps give a protein its three-dimensional shape.
A. hydrophobic interactions?B. ionic bonds?C. hydrogen bonds?D. van der Waal repulsions?E. sulfur-carbon bonds
Which of the following properties pertains to the aorta?
a. radius cannot be changed. b. wall contain a thick layer of smooth muscle. c. responsible for the distribution of blood flow to the various organs. d. the major vessel that contribute to total peripheral resistance. e. richly innervated by sympathetic nerve fibers.
Cutting the phrenic nerves will result in what?
A) air entering the pleural cavity B) paralysis of the diaphragm C) stimulating of the diaphragmatic reflex D) paralysis of the epiglottis.