The only place in the body where blood vessels can be viewed directly is the
A. retina.
B. optic chiasm.
C. sclera.
D. cornea.
E. conjunctiva.
A
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Which of the following minerals is mismatched with its function?
A. Potassium - muscle and nerve function B. Cobalt - erythrocyte production C. Selenium - component of many enzymes D. Zinc - hemoglobin synthesis E. Calcium - bone formation
One of the characteristics of muscle tissue is that is has excitability. Which of the following best describes this characteristic?
A) Muscles respond when stimulated. B) Muscles have membrane potentials. C) Muscles only pull; they cannot push. D) Muscles can stretch when needed.
________ are membranous sacs that detoxify harmful chemicals
A) Rough endoplasmic reticulum B) Golgi apparatus C) Peroxisomes D) Lysosomes
The quadriceps are the prime movers of knee extension. Which muscle group is an antagonist to knee extension?
A) tibialis anterior B) hamstrings C) gluteus maximus D) soleus