If a lever operates at a mechanical disadvantage, it means that the ________
A) effort is farther than the load from the fulcrum
B) load is near the fulcrum and the effort is at the distal end
C) lever system is useless
D) load is far from the fulcrum and the effort is applied near the fulcrum
D
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The calcaneal tendon (Achilles tendon) is the largest tendon in the body
Indicate whether the statement is true or false
Which of the following is involved in the process of muscle relaxation
a. acetylcholinesterase destroys acetylcholine to allow the muscle membrane to return to resting potential. b. Ca2+ is actively taken up by the lateral sacs of the sarcoplasmic reticulum when there is no longer a local action potential. c. the cross bridges from the thick filaments bind to the thin filaments and bend in such a way as to return the filaments to their original resting position. d. both (a) and (b) above. e. all of these answers.
Which cranial nerve IS involved with eye MOVEMENT?
What will be an ideal response?
Baron von Quacko, famous tag-team heavyweight wrestler, has a famous "sleeper hold" that he uses on opponents. Using only a single digit on each hand, he presses on his opponent's neck (while he has them in a full nelson) until his opponent passes out. What are the structures on which he is pressing, and what is the effect?
A. subclavian arteries; blood flow is stopped B. carotid bodies; chemoreceptors stimulated and blood pressure decreased C. baroreceptors in carotid sinus; peripheral vasodilation, decreased heart rate D. vertebral arteries; blood flow to brain is stopped