Describe the general roles of the different types of muscle tissue
What will be an ideal response?
Skeletal muscle moves the bones of the skeleton, cardiac muscle pumps blood through blood vessels, and smooth muscle moves materials along internal passageways.
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If carbon dioxide levels rise in the body, negative feedback mechanisms will trigger
A. an increase in breathing so that carbon dioxide levels decline to the set point.? B. an increase in breathing so that carbon dioxide levels rise further above set point.? C. a decrease in breathing so that carbon dioxide levels rise to the set point.? D. a decrease in breathing so that carbon dioxide levels decline below set point.
A scientist genetically engineers a neuron whose voltage-gated Na+ channels lack the inactivation gate but which is otherwise normal. This neuron would be expected to
a. conduct action potentials bidirectionally. b. lack an absolute refractory period. c. lack a relative refractory period. d. all of these.
What is the innermost layer of a artery wall called?
a. endothelium b. tunica media c. tunica externa d. vasa vasorum
The most superior cervical vertebrae is called what?
A. atlas B. axis C. atlanto-axial D. none of the above