Which statement best describes a short bone?
A. A bone that is longer than it is wide and has clubby ends
B. A bone that is not longer than it is wide
C. A bone that looks like a sesame seed
D. A bone that looks like a sheet of modeling clay molded over an object
Answer: B
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A two-way gut system (i.e., gastrovascular cavity) is a characteristic of
A) Platyhelminths. B) Annelids. C) Arthropods. D) Molluscs.
Cyclic AMP (cAMP) is:
1.a hormone. 2.an enzyme. 3.a second-messenger. 4.a neurotransmitter. 5.an ion.
Which of the following is NOT true concerning an electrical synapse?
A) Connexons carry ions between the two communicating cells. B) Information travels in one direction only. C) This type of synapse is characteristic of cardiac muscle. D) Information transfer does not involve the release of neurotransmitters.
This organ is a large muscular tube that ends at the anus
A) large intestine B) trachea C) esophagus D) small intestine