Which of the following is a characteristic of mature red blood cells?
A. They are able to undergo mitosis.
B. They lack a nucleus.
C. They have numerous mitochondria.
D. They carry most of the carbon dioxide that is transported in the blood.
E. They play an important role in immune defense.
B. They lack a nucleus.
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The presence of abundant smooth endoplasmic reticulum in vertebrate liver cells is related to its function in
a. steroid hormone production. b. enzyme secretion. c. detoxification of harmful substances. d. protein synthesis. e. calcium storage.
The Scapula is _________ to the Ribs and _________ to the Clavical.
a) Superficial, Anterior b) Superficial, Posterior c) Deep, Anterior d) Deep, Posterior
All preganglionic fibers of the ANS pass through the sympathetic chain of ganglia, synapsing at least once there.
Answer the following statement true (T) or false (F)
In order for a molecule to be detected by the olfactory neurons, it must
A. be present in high concentrations. B. be one of the seven primary classes of odors. C. be dissolved in fluid covering the olfactory epithelium. D. interact with the mechanoreceptors of the olfactory hair membrane. E. enter the nose slowly.