Fibrosis of muscle tissue is caused by ________.
A. inflammation of the tendons connecting the muscle to bone
B. inflammation of the fascia surrounding the muscle
C. inflammation of the muscle
D. replacement of muscle tissue by fibrous connective tissue
Answer: D
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The amplitude of an action potential depends in part on the amount of sodium in the extracellular fluid. Stanley Student has carefully impaled a neuron with an intracellular electrode. He tests the role of extracellular sodium by changing the concentration in the bathing fluid and recording an action potential after each change. The data he generated are shown in the table, where amplitude listed
is the peak amplitude of the action potential; make an appropriate graph.
Sperms are stored in which of the following structures?
a. Seminiferous tubules b. Urethra c. Epididymis d. Ductus deferens e. Ejaculatory duct
Below are several structures from the frog heart. Select the correct sequence that lists the structures from the one with the highest rate of contraction, to the one with the lowest rate of contraction
A) sinus venosus, atria, ventricle B) atria, ventricle, sinus venosus C) atria, sinus venosus, ventricle D) ventricle, atria, sinus venosus
Clusters of ganglionic sympathetic neurons that innervate organs in the abdominopelvic region are called ________ ganglia
A) intramural B) collateral C) chain D) paravertebral E) suprarenal