The heart initiates its own action potentials without any external stimulation
Indicate whether the statement is true or false
T
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The stratum ________ is only found in thick skin, such as the skin covering the palms and soles.
Fill in the blank(s) with the appropriate word(s).
Each of the following statements concerning peptide hormones is true except one. Identify the exception.
A) Prohormones can be activated before their release via post-translational modification. B) Peptide hormones interact with receptors on the surface of their target cells. C) Peptide hormones remain in circulation for relatively short periods of time. D) Peptide hormones in the bloodstream are always bound to carrier proteins. E) Peptide hormones are first synthesized as prohormones.
What does the semicircular canals do?
The cells directly responsible for cell-mediated immunity are the ________ cells
A) B B) plasma C) NK D) T E) interferon