When blood glucose levels rise, the pancreatic islets are stimulated to release insulin, which acts on target cells to uptake glucose from the blood. Thus, the islets serve as the ________ in the feedback loop.
A. integrating center
B. sensors
C. effectors
D. All of the choices are correct.
Answer: D
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Going from superficial to deep, the layers of the skin would be:
a. stratum germinativum, stratum corneum, reticular layer, papillary layer b. stratum germinativum, stratum corneum, papillary layer, reticular layer c. stratum corneum, stratum germinativum, papillary layer, reticular layer d. stratum corneum, stratum germinativum, reticular layer, papillary layer
Two hours before major surgery is to begin, the patient experiences "jitters," an elevated heart rate and blood pressure, increased rate of breathing, cold sweats, and an urge to urinate. These symptoms are the result of
A) decreased levels of epinephrine in the blood. B) decreased activity of sympathetic centers in the hypothalamus. C) sympathetic activation. D) increased parasympathetic activity. E) all of these mechanisms.
Surgical cutting of the perineum during delivery is called
A) vasectomy. B) episiotomy. C) vagectomy. D) tubal ligation. E) None of the answers are correct.
Damage to the lower motor neurons would result in ________.
A. heightened reflex responses B. loss of muscle tone C. clonus D. heightened muscle tone