Which of the following bones is a single unpaired bone?
A. Maxilla
B. Parietal
C. Ethmoid
D. Palatine
E. Zygomatic
Answer: C
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Which domain of intracellular receptors binds to responsive elements in the nucleus?
A) DNA-binding domain B) Transactivation domain C) Ligand-binding domain D) Membrane-binding domain
What is oxygen debt?
A. The difference between the resting rate of oxygen consumption and the elevated rate following exercise B. The difference between the oxygen found in myoglobin and the oxygen dissolved in the sarcoplasm C. The difference between the resting rate of oxygen consumption and the oxygen stored by myoglobin D. The difference between the oxygen stored by myoglobin and oxygen diffusing from the extracellular fluids
Which statement best describes the all-or-none principle?
A) An action potential happens completely, or it doesn't happen at all. B) All voltage-gated sodium channels will open or none will open. C) All neurons conduct an action potential together, or none do. D) Local, or graded, potentials will always become action potentials.
Which hormone functions to maintain the corpus luteum, and therefore maintains pregnancy?
A. Human chorionic gonadotropin (HCG) B. Progesterone C. Estrogen D. LH