If the signal molecule acts on the cell that secreted it, the chemical is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
autocrine
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If an individual's respiratory rate decreases, then blood CO2 levels
A. rise, blood H+ levels rise, and blood pH rises. B. rise, blood H+ levels rise, and blood pH falls. C. rise, blood H+ levels fall, and blood pH falls. D. fall, blood H+ levels rise, and blood pH rises. E. fall, blood H+ levels fall, and blood pH falls.
The larynx can be palpated from outside the body
Indicate whether the statement is true or false
Squamous epithelial cells ________
A) are as tall as they are wide, like cubes B) are thin and flat, like fish scales C) are taller than they are wide, like columns D) have no nuclei
Select which steps are part of the voluntary movement process. (Check all that apply.)
A. Smooth muscle in the skin is stimulated to contract. B. The cerebellum and basal nuclei coordinate the information for these movements. C. Initiation begins in the brainstem. D. Lower motor neurons receive messages from upper motor neurons. E. Upper motor neurons receive information from lower motor neurons. F. Initiation begins in the primary motor area of the cerebral cortex.