What creates the alternating light and dark bands that provides the striation pattern on skeletal muscle tissue?
A) sarcoplasm and sarcolemma
B) thick filaments and myosin heads
C) A bands and I bands
D) H zones and M lines
E) Z discs and H zones
C
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If someone speaks too loudly into a microphone, a public address system will sometimes produce a loud whistle of amplified feedback
Explain whether this is an example of negative or positive feedback, and explain how the microphone, control box, and speaker of the system serve as the different components of a feedback loop.
________ is the substrate of ________.
A. Glucose; lactose B. Lactose; lactase C. Sucrase; sucrose D. Lactase; glucose E. Galactose; lactose
In vertebrates, substances from the blood can access the central nervous system by
A) Gap junctions. B) Pinocytosis. C) Catalyzed transport. D) All of the above
If the systolic pressure is 120 mm Hg and the diastolic pressure is 90 mm Hg, what is the mean arterial pressure (MAP)?
a. 30 mm Hg b. 80 mm Hg c. 100 mm Hg d. 210 mm Hg