Homework Answers
50) The answer will be option A that is tetanic contraction is a result of sum of twitches creating a long contraction. These are further divided into fused and unfused tetanus.
49) Contraction in smooth muscles is brought about by phosphorylation of myosin. Hence answer is third option that is myosin light chain.
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Question 50 1 pts What happens during a tetanic contraction in skeletal muscle? Twitches sum together,...
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z...
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z discs move closer together as the myosin heads move toward the plus ends of the actin filaments. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels...
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...
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal...
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal muscle cell? A single action potential in the motor neuron causes a sustained contraction Multiple action potentials in the motor neuron cause a sustained contraction. The action potential in the muscle cell is prolonged to last as long as the contraction Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate, causing a sustained contraction ( A...
> Question 42 1 pts forms a crossbridge with the thin filament during muscle contraction. Tropomyosin...
> Question 42 1 pts forms a crossbridge with the thin filament during muscle contraction. Tropomyosin The myofilament The M line O Myosin The line Question 43 1 pts Cardiac output: O is equal to the heart rate multiplied by the stroke volume. O is the amount of blood pushed out of the heart in one heart beat, O is equal to the heart rate plus the strake volume is regulated only by the sympathetic division of the autonomic nervous...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing the status (active or nonactive) of the voltage-gated sodium channel, voltage-gated potassium channel, sodium/potassium pump, and overall voltage and/ or voltage range (in millivolts, or mV) for each of the following. A) Resting membrane (prior to the initiation of an action potential) B) just before threshold to just after threshold (Depolarization) C) Rising phase of the action potential D) Falling phase of the action...
what are the correct answers? Question 1 of 20 0.0/ 1.0 Points What roles do calcium...
what are the correct answers?
Question 1 of 20 0.0/ 1.0 Points What roles do calcium ions play? Indicate EVERY correct response. A. Ca2+ transmits the electrical signal down the length of the axon B. Ca2+ binds to the skeletal muscle receptors at the synapse C. Ca2 stabilizes the sarcomere structure during times of metabolic stre ss D. Ca2+ trigger exOcytosis of the neurotransmitters at the neuromuscular junction E. Ca+ causes the troponin/tropomyosin to expose actin's binding sites Question 13...
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...
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....
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z discs move closer together as the myosin heads move toward the plus ends of the actin filaments. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels...
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...
Question 16 (1 point) What is the best description of a tetanic contraction in a skeletal muscle cell? A single action potential in the motor neuron causes a sustained contraction Multiple action potentials in the motor neuron cause a sustained contraction. The action potential in the muscle cell is prolonged to last as long as the contraction Repeated action potentials from the motor neuron summate into a sustained depolarization of the motor end plate, causing a sustained contraction ( A...
> Question 42 1 pts forms a crossbridge with the thin filament during muscle contraction. Tropomyosin The myofilament The M line O Myosin The line Question 43 1 pts Cardiac output: O is equal to the heart rate multiplied by the stroke volume. O is the amount of blood pushed out of the heart in one heart beat, O is equal to the heart rate plus the strake volume is regulated only by the sympathetic division of the autonomic nervous...
what are the correct answers?
Question 1 of 20 0.0/ 1.0 Points What roles do calcium ions play? Indicate EVERY correct response. A. Ca2+ transmits the electrical signal down the length of the axon B. Ca2+ binds to the skeletal muscle receptors at the synapse C. Ca2 stabilizes the sarcomere structure during times of metabolic stre ss D. Ca2+ trigger exOcytosis of the neurotransmitters at the neuromuscular junction E. Ca+ causes the troponin/tropomyosin to expose actin's binding sites Question 13...
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...
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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