When calcium ion binds to troponin,
A) tropomyosin rolls away from the active site.
B) active sites on the myosin are exposed.
C) actin heads will bind to myosin.
D) muscle relaxation occurs.
E) myosin shortens.
A
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Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order, from lumen to external surface?
A. Serosa, lamina propria, submucosa, muscularis mucosae, muscularis externa B. Mucosa, submucosa, muscularis mucosae, muscularis externa, lamina propria C. Mucosa, submucosa, muscularis externa, lamina propria, serosa D. Lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa E. Mucosa, muscularis mucosae, submucosa, muscularis externa, lamina propria
Which of the following facial bones is correctly matched with its function?
A. Zygomatic - provides attachment point for temporalis muscle B. Maxilla - possesses sockets for teeth C. Yemporal - is part of the orbit D. Vomer - forms the hard palate E. Inferior nasal conchae - contain nasolacrimal canals
There are _____ main types of sweat glands.
Fill in the blank(s) with the appropriate word(s).
This is a diagram of a multipolar neuron. What does "E" represent?
A. dendrite B. cell body of neuron C. axon D. nucleus of neuron E. neuroglia cells