Which of the following is NOT part of the colon?
A. Rectum
B. Ascending colon
C. Transverse colon
D. Sigmoid colon
Answer: A
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Which does not drain into the coronary sinus?
A. Great cardiac vein B. Anterior interventricular vein C. Small cardiac vein D. Middle cardiac vein E. No exceptions; all choices drain into the coronary sinus.
Parasympathetic effects are localized and short-lived because
A) muscarinic receptors are deactivated by norepinephrine. B) acetylcholine is inactivated at the synapse by acetylcholinesterase. C) norepinephrine hyperpolarizes the postganglionic membrane. D) norepinephrine is inactivated at the synapse by monoamine oxidase. E) epinephrine blocks the muscarinic receptors.
The dissociation constant (K) for a particular acid is
a. [H+][HCO3-] / [H2CO3] b. [HCO3-] / [H2CO3][H+] c. [HCO3-][H2CO3] / [H+] d. [H2CO3][H+] / [HCO3-] e. [H+] / [HCO3-][H2CO3]
The striations in striated muscle correspond with actual molecular structures. Which of the following is the I band?
A) a band where only actin myofilaments are found B) a band where only myosin myofilaments are found C) an attachment point for actin myofilaments D) an attachment point for myosin myofilaments