Define line of action
A) The line of action is the direction a bone is pulled towards.
B) The line of action is the line of force produced when a muscle contracts.
C) The line of action is the name for all the muscles that lie parallel to the bone.
D) The line of action is the position of the fulcrum in a first-class lever.
E) The line of action is the name for all the muscles that permit a particular action.
Answer: B
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A) Artery B) Vein C) Capillary D) Venule
Prominent muscular ridges in the anterior atrial wall and auricles are called
A) pectinate muscles. B) conus arteriosus. C) papillary muscles. D) trabeculae carneae. E) fossa ovalis.
The sympathetic pathway has ________ preganglionic fibers and ________ postganglionic fibers
A) long; short B) short; long C) short; short D) long; long