While traveling abroad in Africa you observe a large number of people with goiter (enlarged thyroid). Which mineral deficiency could be responsible for this?
A) iodine
B) chromium
C) fluorine
D) iron
A
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Smooth muscle lacks
A. myofibrils. B. transverse tubules and striations. C. actin and myosin. D. nuclei and mitochondria.
The maxillary branch of this labeled cranial nerve is found in the area where dentists apply anesthetic drugs for numbing the upper jaw
a) E b) G c) H d) I e) J
To calculate GFR, the concentration of a marker molecule is measured in both the blood and the urine, and the total volume of urine produced is also measured. Which of the following sets of results indicates the highest GFR?
A. High concentration of the marker in the blood, high volume of urine, low concentration of the marker in the urine B. High concentration of the marker in the urine, high volume of urine, low concentration of the marker in the blood C. High concentration of the marker in the urine, low volume of urine, high concentration of the marker in the blood D. High concentration of the marker in the blood, low volume of urine, high concentration of the marker in the blood
The characteristic reddish brown color of skeletal muscle comes from which substance?
A) Actin B) Myoglobin C) Myosin D) Calcium