At the AV node of the conduction system, the action potential is
A. rapidly advanced due to the cells being large and well connected by gap junctions.
B. rapidly advanced due to the cells being small and well insulated by myelin.
C. delayed due to the cells being small and having few gap junctions.
D. delayed due to the cells being large and having many leakage channels.
C
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________ are Z disc proteins that anchor and interconnect the thin filament ends at either end of a sarcomere.
Fill in the blank(s) with the appropriate word(s).
The rectus femoris is one of the four heads of the quadriceps femoris.
Answer the following statement true (T) or false (F)
Which of the following are true of the axial musculature?
A) It arises, but does not insert, on the axial skeleton. B) It makes up 40 percent of the body musculature. C) It stabilizes the pectoral and pelvic girdles. D) It arises on the axial skeleton. E) It arises elsewhere, but inserts on the axial skeleton.
The medial concavity of the kidney is called the ________, which admits the renal nerves, blood vessels, lymphatic vessels, and ureter.
A. cortex B. corpuscle C. capsule D. hilum E. medulla