Which type of skeletal muscle fibers is generally recruited first?
A. Type I
B. Type II
A
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The posterior ridge on the shaft of the femur that serves as an attachment for numerous muscles is the __________ __________.
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) These cells, like the cells of the corneal layer of the integument are not living cells. B) The nutrients and waste products of the anterior segment diffuse into and through the vitreous humor of the posterior segment. C) The aqueous humor is continuously replenished and flows from the ciliary process to drain in the scleral venous sinus. D) The metabolic activity of these cells is very low. They produce little waste and need few nutrients.
What is the main stimulus for bile secretion from the gallbladder?
A. cholecystokinin B. vagal stimulation C. secretin D. large amounts of protein in the chyme
By age 20, nearly everyone has some evidence of osteoarthritis in their joints
a. true b. false