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Exam 8 DEC
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Preguntas del test (15)
1Which is a correct statement about ATP in skeletal muscle?
- Aits binding to actin during crossbridge cycling prevents rigor mortis.
- Bit is required to decrease the calcium level within the SR
- Cthe speed at which it is broken down within cross bridge cycling is the same in all myofibers
- Dthere are four sources for its production
2the muscle types of ____ and ____ are able to impact the volume of an organ and the muscle type of ___ is under conscious control.
- Acardiac - smooth - skeletal
- Bcardiac - skeletal - smooth
- Cskeletal - smooth - cardiac
- Dsmooth - skeletal - cardiac
3which of these acts causes the tension increase in cross bridge cycling?
- Athe release of ATP from the cross bridge
- Bthe binding of ATP to the cross bridge
- Cthe release of Pi from the cross bridge
- Dthe release of the actin from the cross bridge
4At one dorm, the favorite pastime is for one student to jump in a large garbage can while another student uses the rope tied to the can to pull the can and the first student around the courtyard. Unfortunately, when it is your turn, the student in the bucket is a 310-lb offensive lineman for the football team. Needless to say, try as you might, the can never moves. But all is not lost, because from your post of view, you correctly describe what occurs with your skeletal muscle as
- Atension was not generated so your muscles did not shorten
- BEccentric contractions were not occurring because the load was independent
- Cthe latent period prior to isotonic contraction was not present
- Dsarcomeres were not being shortened during the attempt
5the H zone contains the ___ and then ___ contains the Z-line/disk.
- AM-line - A band
- BZ-line - Aband
- CM-line - I band
- DZ-line - I band
6We are a Coca-Cola Campus. You decide to switch from drinking Coke to sugar-free Diet Coke. You are not surprised when the Diet Coke tastes similar to Coke. You correctly realize that the Diet Coke ___ contain compounds that can bind to the sweet receptors on your tongue and act as ___.
- ADoes not - antagonists
- BDoes - antagonists
- CDoes not - agonists
- DDoes - agonist
7In the Party Room, a group of students decide to learn this exam's material by physically acting everything out. After a couple of hours hard at work, they have a question for the Phys Phab. When Melanie walks over to the group, she quickly realizes that several of them are now badly in need of showers. The correct order for processing this information is ___ first and ___ last.
- Aprimary olfactory - olfactory bulb
- Bprimary olfactory - orbitofrontal cortex
- Colfactory bulb - primary olfactory cortex
- Dolfactory bulb - orbitofrontal cortex
8Mrs. Flarplord Baggins has re-designed Crabix to paralyze humans. Scientists determine that this Crabix does not impact any calcium channels and that the myofibers still depolarize. Consequently, Crabix might be preventing skeletal muscle contraction by
- Apreventing the tropomyosin from moving relative to the thin myofilament
- Bbinding to the sodium channels on the myofber with a higher affinity than the acetylcholine
- Cblocking the calcium channels in the transverse tubules
- Dhyperpolarizing the motor neuron and thereby preventing the movement of calcium ions
9When the cytosolic calcium level of a myofiber is increasing, the length of the A band will ___ and the length of the _____ will decrease.
- Adecrease - M zone
- Bremain the same - M zone
- Cdecrease - H zone
- Dremain the same - H zone
10Which of the following actions must occur for a myofiber to relax?
- Acalcium must be pumped back into the interstitial fluid
- BADP must be present to detach the myosin from the actin
- Cthe interstitial acetylcholine at the junction must be eliminated
- Dall three statements are correct about relaxing a myofiber
11Isaacs Syndrome (aka neuromyotonia) causes continuous myofiber stimulation due to motor neurons repeatedly having action potentials generated on their axons. Based on this information and our correct knowledge of properly functioning, skeletal muscles, we can correctly determine that patients with this syndrome will have _____ within their myofibers when compared to normal individuals
- Aa consistently higher level of sodium
- Bthe same amount of calcium
- CBoth statements are correct
- Dneither statement is correct
12which pair are both taste receptors that detect compounds that are directly involved in ATP production within the mitochondria?
- Asweet and umami
- Bfat and sour
- Cfat and umami
- Dall three pairs are correct
13which is a correct statement about the comparison between lifting a light and a heavy weight?
- Athe heavy weight will require the activation of fewer motor units
- Bthe velocity will be slower when lifting the heavy weight
- Cthe response will be greater with the heavy weight
- Dall three statements are correct
14an unfortunate accident causes a patient to have no fluid present within his vestibular system. Consequently, you correctly realize that this patient will
- Abe able to correct determine if he is falling towards his right but not his left side
- Bhave images appear normal within his vision when he walks
- Cboth statements are correct
- Dneither statement is correct
15Which is a correct statement about calcium in skeletal muscles?
- Athe structure in which it is stored surrounds the myofibrils
- Bthere are two locations of voltage-gated calcium channels in the muscle fibers
- Cboth statements are correct
- Dneither statement is correct
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- El usuario ha eliminado su información de asignaturas Test sobre Exam 8 DEC, creado por Usuario eliminado el 20/11/2017.
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