Synthesis of a new strand of messenger RNA is in the 5' to 3' direction.
a. true
b. false
a. true
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Tissue damage can trigger local release of histamine, which can
A. stimulate release of nitric oxide, a vasodilator. B. stimulate release of nitric oxide, a vasoconstrictor. C. inhibit release of nitric oxide, a vasodilator. D. inhibit release of nitric oxide, a vasoconstrictor.
People with blood type ____ can receive blood type AB-
A. O- B. AB+ C. O+ D. B- E. A+
Which statement about neural reflex arcs is incorrect?
A) They contain the following elements: receptor, integrating center, and effector. B) An afferent path leads to the integrating center and an efferent path leads away from it. C) They are slowed down by the hormones involved. D) Their function is to protect the body from harm caused by homeostatic imbalances or external events.
An unmyelinated axon will conduct action potentials more ___ than a myelinated axon.
Fill in the blank(s) with the appropriate word(s).