Which chemical induces prolonged contraction of smooth muscle during allergic reactions?
a. basophil chemotactic factor
b. eosinophil chemotactic factor
c. histamine
d. SRS-A
e. TP-2
D
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Which of the following medications serves as a positive treatment by interfering with the removal of calcium ions from the sarcoplasm of cardiac muscle cells?
a. verapamil b. acetylcholine c. beta blockers d. digitalis
Which of the following is the best explanation for why night vision is fuzzy and indistinct?
A) Rods contain a single kind of visual pigment. B) Cones come in three types, each sensitive to different wavelengths of light. C) The foveae are densely packed with cones. D) As many as 100 cones may converge on one ganglion cell.
The patient is a 28-year-old female with type-1 diabetes mellitus. She developed viral gastroenteritis with nausea and vomiting. She did not take her insulin and she became increasingly nonresponsive
Her husband called 911 and she was taken to the emergency room. Her pulse rate was 128 and her respiratory rate was 28, deep, and smelled fruity (Kussmaul breathing). Her urinary glucose and ketone levels were both 4+. Her pH was dangerously low. Explain how the body attempted to compensate for the low serum pH. What will be an ideal response
Melatonin is secreted by the ____ to regulate the sleep/wake cycle.
Fill in the blank(s) with the appropriate word(s).