Homework Answers
- Na+ diffuses in,producing depolorization stimulus.
- Ca^+2 binds troponon stimulating contraction.
- Action potential produced.
- Action potential conducted along tranverse tubules.
- Ca^+2 release channels in SR open.
- Ca^+2 diffuses out into sarcoplasm.
- Action potential open voltage-gated Ca^+2 channels.
- Binds to nictotonic ACH receptors , opens ligand (chemically)-gated channels.
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Help Save & Exit Su um 30 Put the events in order regarding excitation-contraction coupling. Somatic...
8. During ventricular systole, the semilunar valves open before the atrioventricular valves a. True b. False...
8. During ventricular systole, the semilunar valves open before the atrioventricular valves a. True b. False 9. Sequence. Place the following events in excitation-contraction coupling in the correct sequence. Action potential produced in muscle cell Action potentials open voltage-gated Ca* channels Na diffuses into muscle cell, producing depolarizing stimulus Ca* release channels in sarcoplasmic reticulum (SR) open Ca²+ diffuses out into sarcoplasm ACh binds to nicotinic ACh receptor, opening ligand gated channels Action potentials conducted along transverse tubules 3 Ca2+...
B C). F Fotch G I Anind A [Choose) B [Choose ] Acetyl-choline gated sodium channels...
B C). F Fotch G I Anind A [Choose) B [Choose ] Acetyl-choline gated sodium channels open, causing a graded potential on the sarcolemma An action potential moves across the sarcolemma and down the t-tubules An action potential arrives in the muscle cell via gap junctions The calcium ATPase is always active Ca++ is released from the sarcoplasmic reticulum through the opening of voltage gated calcium channels (DHP- Calcium diffuses through the cytosol and binds with troponin Acetylcholine binds with...
Put these steps in neuromuscular junction synaptic transmission and excitation-contraction coupling in chronological order. A. Ryanodine...
Put these steps in neuromuscular junction synaptic transmission and excitation-contraction coupling in chronological order. A. Ryanodine receptors open B. Voltage-gated Na+ channels open in the muscle cell membrane near the neuromuscular junction C. Tropomyosin rotates into the groove of the thin filament (out of the way of the myosin binding site) D. Depolarization of motoneuron axon terminal E. Ca2+ dissociates from troponin F. [Ca2+] rises in the muscle cell cytoplasm G. An EPSP occurs in the muscle cell H. Myosin...
Regarding the neuromuscular junction... a. Depolarization of the presynaptic membrane directly causes voltage-gated calcium channels in...
Regarding the neuromuscular junction... a. Depolarization of the presynaptic membrane directly causes voltage-gated calcium channels in the membrane to open. b. Action potentials in the sarcolemma directly cause calcium channels to open. c. Action potentials in the sarcoplasmic reticulum indirectly cause the calcium ATPase pump to function, if ATP is present. d. both a) and b) are correct, and c) is incorrect e. a), b) and c) are all correct 2) Following ATP hydrolysis by myosin, which steps occur during...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the 5. Skeletal muscle fibers are formed from embryonic cells calledwhich fuse together, making skeletal muscle cells multinucleated. 1. a. sarcomeres b. myofibrils c. myoblasts d. fascicles a. Z line. b. I band c. M line. d. H band e. zone of overlap. 6. Titin is a(n) a. elastic protein. b. thin filament protein. 2. A thin layer of connective tissue that surounds a muscle...
QUESTION 7 What happens (immediately) if T-tubules blocked in skeletal muscle action potential increased an action...
QUESTION 7 What happens (immediately) if T-tubules blocked in skeletal muscle action potential increased an action potential blocked from progressing in fibril Myosin phosphatase in muscle O4(MP) activated d. inactivated QUESTION 8 Can be activated by stretch receptors (best answer only) a. Skeletal muscle Ob. smooth muscle Oc. myosin light chain phosphataso Od. A and B QUESTION 9 Action potential leads to activation of neurotransmitter in muscle answer true or false a true b. false c. not sure od silly...
change pas channels in the volta t ive protein to change shape. This A of the...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
Directly responsible for the power stroke associated with contraction Release of O a Natt release of...
Directly responsible for the power stroke associated with contraction Release of O a Natt release of Phosphate and ADP from myosin Dhead o Binding of binding of Phosphate and ADP to actin d, head QUESTION 16 Can lead to muscle atrophy a. Limb cast b. space flight Oc.sedentary life style d. all of above QUESTION 17 Highest concentration of Car+ voltage gated channels in which a cardiac caveolae b. skeletal muscle s intercalated disk d. Smooth muscle QUESTION 18 Muscle...
1. According to the paper, what does lactate dehydrogenase (LDH) do and what does it allow...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
8. During ventricular systole, the semilunar valves open before the atrioventricular valves a. True b. False 9. Sequence. Place the following events in excitation-contraction coupling in the correct sequence. Action potential produced in muscle cell Action potentials open voltage-gated Ca* channels Na diffuses into muscle cell, producing depolarizing stimulus Ca* release channels in sarcoplasmic reticulum (SR) open Ca²+ diffuses out into sarcoplasm ACh binds to nicotinic ACh receptor, opening ligand gated channels Action potentials conducted along transverse tubules 3 Ca2+...
B C). F Fotch G I Anind A [Choose) B [Choose ] Acetyl-choline gated sodium channels open, causing a graded potential on the sarcolemma An action potential moves across the sarcolemma and down the t-tubules An action potential arrives in the muscle cell via gap junctions The calcium ATPase is always active Ca++ is released from the sarcoplasmic reticulum through the opening of voltage gated calcium channels (DHP- Calcium diffuses through the cytosol and binds with troponin Acetylcholine binds with...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
Multiple choice questions-Tor tes scantron questios s In a sarcomere, cross-bridge formation occurs specifically in the 5. Skeletal muscle fibers are formed from embryonic cells calledwhich fuse together, making skeletal muscle cells multinucleated. 1. a. sarcomeres b. myofibrils c. myoblasts d. fascicles a. Z line. b. I band c. M line. d. H band e. zone of overlap. 6. Titin is a(n) a. elastic protein. b. thin filament protein. 2. A thin layer of connective tissue that surounds a muscle...
QUESTION 7 What happens (immediately) if T-tubules blocked in skeletal muscle action potential increased an action potential blocked from progressing in fibril Myosin phosphatase in muscle O4(MP) activated d. inactivated QUESTION 8 Can be activated by stretch receptors (best answer only) a. Skeletal muscle Ob. smooth muscle Oc. myosin light chain phosphataso Od. A and B QUESTION 9 Action potential leads to activation of neurotransmitter in muscle answer true or false a true b. false c. not sure od silly...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
Directly responsible for the power stroke associated with contraction Release of O a Natt release of Phosphate and ADP from myosin Dhead o Binding of binding of Phosphate and ADP to actin d, head QUESTION 16 Can lead to muscle atrophy a. Limb cast b. space flight Oc.sedentary life style d. all of above QUESTION 17 Highest concentration of Car+ voltage gated channels in which a cardiac caveolae b. skeletal muscle s intercalated disk d. Smooth muscle QUESTION 18 Muscle...
1. According to the paper, what does lactate dehydrogenase
(LDH) do and what does it allow to happen within the myofiber? (5
points)
2. According to the paper, what is the major disadvantage of
relying on glycolysis during high-intensity exercise? (5
points)
3. Using Figure 1 in the paper, briefly describe the different
sources of ATP production at 50% versus 90% AND explain whether you
believe this depiction of ATP production applies to a Type IIX
myofiber in a human....
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