Exam 8 Flashcards
Dr. Scarlet assess Patient X’s ability to move a glass of water from a table to their mouth with only their forearm/lower arm moving. As this movement is accomplished in the typical manner, Dr. S states that…
A. This action involved two of the three muscle contraction types
B. If the glass was switched out for a heavier container, the response would have been decreased
C. While the glass was moving, Patient X’s tension was increasing
D. During this process, Patient X’s tension was always greater than the load
A. This action involved two of the three muscle contraction types
Herbie Husker was shrunk by Brutus to the size of an ion and placed near a skeletal myofiber. As Herbie watches one action potential propagated along this myofiber, he correctly states that…
A. The amount of calcium in the myofiber will increase
B. Calcium will bind to tropomyosin
C. The muscle will definitely begin shortening
D. A twitch will occur in the myofiber
D. A twitch will occur in the myofiber
Which is a correct statement about glycolysis in skeletal myofibers?
A. The glucose could be from the blood and transported to the cytosol or already in the cytosol
B. Osmolarity issues are resolved with storage of free glucose
C. It will be one of two ATP sources during prolonged activity
D. Its lactate can be processed in the myofiber
A. The glucose could be from the blood and transported to the cytosol or already in the cytosol
Brutus was doing isometric exercises at the RPAC. He correctly stated that the tension he was generating was ____ and his sarcomeres were ____
A. Changing, not changing in length
B. Not changing, not changing in length
C. Changing, changing in length
D. Not changing, changing in length
C. Changing, changing in length
Which is a correct statement that Carmen made about the somatic nervous system?
A. Most skeletal muscle movement is initiated by the cerebellar cortex
B. Its neurons are associated with the ventral side of spine
C. Each of its motor units contains just one single myofiber
D. Its neurons utilize the same neurotransmitter as the sympathetic’s postganglionic neurons
B. Its neurons are associated with the ventral side of the spine
An A band fully contains…
A. A Z line
B. Thin myofilaments
C. An I band
D. A sarcomere
B. Thin myofilaments
A duck and a chicken discuss their flight experiences. While the duck regularly flies long distances, the chicken is essentially a flightless bird so utilizes its flight muscles much less than the duck. Consequently, they correctly concluded that the duck’s flight muscles would ____ than the chicken’s flight muscles
A. Be darker in coloration
B. Contain more glycogen
C. Contain less mitochondria
D. Generate more lactic acid, when used typically
A. Be darker in coloration
Sydney correctly verified which student statement in the Party Room about crossbridge cycling?
A. The release of Pi from it allows for the flex of the actin crossbridge
B. Myosin has less compounds binding/unbinding from it than actin does from itself
C. The process directly includes our Critical Equation #2
D. The loss of ATP will result in myosin being unable to unbind from actin
D. The loss of ATP will result in myosin being unable to unbind from actin
Which of the following actions must occur for a myofiber to relax?
A. Calcium must be pumped back into the sarcoplasmic reticulum
B. ADP must be present to detach the myosin from the actin
C. The interstitial acetylcholinesterase at the junction must be eliminated
D. The calcium channels in the plasma membrane of the myofiber must be closed
A. Calcium must be pumped back into the sarcoplasmic reticulum
In the skeletal muscle, which is a correct statement regarding creatine phosphate and Krebs cycle?
A. They both use the same method to create ATP
B. Both can create ATP under aerobic conditions
C. Both statements are correct
D. Neither statement is correct
C. Both statements are correct.
While studying, Libby recalled which correct statement about skeletal muscle structures?
A. There are more myofilaments than myofibrils
B. Myofibers are multinucleated
C. Both statements are correct
D. Neither statement is correct
C. Both statements are correct.
Utilizing our Figure 82, you correctly explain to a classmate that, during a twitch…
A. The relaxation period is always shorter than the contraction period
B. A larger stimulus will result in a higher peak of tension
C. Both statements are correct
D. Neither statement is correct
D. Neither statement is correct
Myofibers of the ___ type generate ATP mainly under ___ conditions and produce ___ of tension
A. Fast-oxidative, aerobic, small amounts
B. Slow-oxidative, aerobic, large amounts
C. Fast-glycolytic, anaerobic, very large amounts
D. All three statements are correct
C. Fast-glycolytic, anaerobic, very large amounts
Which is a correct statement about tetanus?
A. Most daily activities are completed using fused tetanus
B. Fused tetanus requires a higher amplitude of action potentials to occur
C. Both statements are correct
D. Neither statement is correct
D. Neither statement is correct
Dr. Gray’s Patient Y has ingested a toxin that has eliminated their ability to have action potentials near their neuromuscular junctions. Consequently, Dr. G realizes that A. This toxin cannot be an antagonist
B. The usual calcium influx into the motor neuron will not be possible
C. Both statements are correct
D. Neither statement is correct
C. Both statements are correct.
