What is a power stroke?
A. The grabbing hold of the actin active sites by myosin
B. The binding of ATP to myosin
C. Myosin pulling on actin to draw Z-lines toward the center, shortening the sarcomere
D. The electrical impulse that travels down the nerve cell to stimulate the muscle cell
Answer: C
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The space between the iris and the lens is the
A) anterior chamber. B) posterior chamber. C) pupil. D) scleral venous sinus. E) vitreous body.
One type of skin cancer, which often results in a potentially fatal metastasis, arises in the pigment-producing cells called ________.
Fill in the blank(s) with the appropriate word(s).
What does a hepatic triad consist of?
A. A central vein, a hepatic lobule, and a hepatic sinusoid B. The common hepatic duct, cystic duct, and bile duct C. A bile ductule, a branch of the hepatic artery, and a branch of the hepatic portal vein D. The hepatic portal vein and two hepatic ducts E. The right, left, and common hepatic ducts
The site where spinal nerves exit the vertebral column is the
A. intervertebral disk. B. vertebral foramen. C. lamina. D. intervertebral foramen. E. spinous process.