Which of the following factors gives the myocardium its high resistance to fatigue?
a. the presence of intercalated discs
b. a very large number of mitochondrion in the cytoplasm
c. gap junctions
d. the coronary circulation
Answer: b. a very large number of mitochondrion in the cytoplasm
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Diffusion, degradation, reuptake all describe the mechanisms of ___.
Fill in the blank(s) with the appropriate word(s).
Nutrients are delivered and waste products are carried away from the cells of the posterior segment of the eye by blood vessels. However, the cells in the cornea and lens (in the anterior segment) are avascular
Which is the best explanation for how these cells are maintained? A) The nutrients and waste products of the anterior segment diffuse into and through the vitreous humor of the posterior segment. B) The metabolic activity of these cells is very low. They produce little waste and need few nutrients. C) These cells, like the cells of the corneal layer of the integument are not living cells. D) The aqueous humor is continuously replenished and flows from the ciliary process to drain in the scleral venous sinus.
The surgical removal of bladder stones is __________
Fill in the blank(s) with correct word
Answer the following statements true (T) or false (F)
1. A diarthrotic joint is a freely moving joint. 2. The sutures of the skull are synarthrotic joints. 3. The knee is an amphiarthrotic joint. 4. The hip is a diarthrotic joint. 5. A ligament is a band of connective tissue that holds two bones together.