Which of the following is true of inclusions?
A. They are one component of the cytoskeleton.
B. An example of an inclusion is a mitochondrion.
C. They are never enclosed in a unit membrane.
D. They are essential for cell survival.
E. They are enclosed in a unit membrane.
Answer: C
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A) Vessels B) Lungs C) Kidneys D) Heart
The medulla oblongata relays auditory stimuli to the
A) substantia nigra. B) red nuclei. C) cerebral peduncles. D) superior colliculi. E) inferior colliculi.
Which of the following statements best describes what fingernails actually are?
A) Fingernails are a modification of the epidermis. B) Fingernails are derived from osseous tissue. C) Fingernails are extensions of the carpal bones. D) Fingernails are a separate tissue from the skin, formed from a different embryonic layer.
Which of the following statements regarding neurotransmitters is TRUE?
A. Acetylcholine is broken down by enzymes present on postsynaptic cell membranes. B. Acetylcholine that is released at synapses binds to adrenergic receptors in the postsynaptic cell membrane. C. Catecholamines are the most abundant neurotransmitters in the central nervous system. D. Opiate drugs, such as morphine, are antagonists of a class of neurotransmitters called endorphins. E. Gamma-aminobutyric acid (GABA) is a major excitatory transmitter in the central nervous system.