Question
In: Anatomy and Physiology
Answer true/false for the following: 1. The power stroke is generated during the contraction-relaxation phase. 2....
Answer true/false for the following:
1. The power stroke is generated during the contraction-relaxation phase.
2. Reformation of cross bridges occurs during the excitation-contraction phase.
Solutions
Expert Solution
1st Statment: false.
The power strock is generated during the contraction phase.
After formation of cross bridges, the cross bridge pulls the attached actin filaments towards the center of the A band. The Z lines attached to these actin filaments are also pulled in wards from both sides, there by causing shortening of the sarcomere i.e. contraction.
During the shortening of the muscle the I bands get reduced in size/ length ( z membranes of the sarcomere are brought closer, whereas the A bands retain their size/ length. It is important to note that myofilaments do not actually shorten. As the thin filaments are pulled deep in to the A bands makeing H bands narrow, the muscle shows the effect contraction.
2 nd Statment is false.
Reforming of cross bridge occur during the contraction phase.
After power stock is completed the myosin head releases the ADP. At the end of the power stoked, the myosin head binds to new molecule of ATP, which displaces / release it form actin. The combination power of several cross bridge cycles causes the muscle to contract. These cycles continue as long as the muscle receives stimuli.
Sydney Mullin answered 1 year agoRelated Solutions
1.Describe the effects of the sympathetic nerves on cardiac muscle during contraction and relaxation. 2.Define preload,...
1.Describe the effects of the sympathetic nerves on cardiac
muscle during contraction and relaxation.
2.Define preload, afterload, and contractility.
3.Describe the spread of excitation from the SA node through the
rest of the heart.
4.Red blood cells have a lifespan of 120 days. What happens to
the blood cell when it dies? Discuss the locations of death,
by-products, and formation of RBC.
5.Describe the process of chemotaxis or emigration.
During the excitation phase of the skeletal muscle cell contraction, the following occurs: 1) the muscle...
During the excitation phase of the skeletal muscle cell
contraction, the following occurs:
1) the muscle fiber develops tension and shortens
2) the muscle fiber relaxes and returns to its original
length
3) nerve action potentials lead to muscle action potentials
A growing long bone in a child has only two types of cartilage
at the epiphysis. These two areas are
1) elastic cartilage and epiphyseal plate
2) epiphyseal plate and epiphyseal line
3) primary and secondary ossification centers
4)...
Answer the following questions True or False. Write “True” or “False” in the blank. 1._________ The...
Answer the following questions True or False. Write “True” or
“False” in the blank. 1._________ The rate constant changes if the
concentrations of the reactant change. 2._________ If the
concentration of a reactant changes, the rate of the reaction
always changes. 3._________ The coefficients of the overall
reaction tell us the order for each reactant. 4._________ The
half-life for a first order reaction does not depend on the initial
concentration. 5._________ If the rate of a reaction over a long...
Answer True or False for each of the following. If your answer is FALSE, provide an...
Answer True or False for each of the following. If your answer
is FALSE, provide an example that proves your point. If your answer
is true, explain.
Given a typical set of numerical data with an ODD number of
values.
1. The mean is always one of the data values.
2. The median is always one of the data values
3. The mode is always one of the data values.
4. The range measures the variability of the given data...
Answer each question by True or False. Justify your answer. (1) True or False? The set...
Answer each question by True or False. Justify your answer.
(1) True or False? The set V = {p ∈ P2: p (7) = 0, p’ (7) = 0}
is a subspace of P2.
(2) True or False? The set of 2 by 2 matrices whose entries are
either all 0 or all nonzero is a subspace of the set of all 2 by 2
matrices M2×2(R).
(3) True or False? The set of all functions in C([0, 1]) such...
During the power stroke in a four-stroke automobile engine, the pis-ton is forced down as the...
During the power stroke in a four-stroke automobile engine, the
pis-ton is forced down as the mixture of combustion products and
air undergoes an adiabatic expansion. Assume (1) the engine is
running at 2500 cycles/min; (2) the pressure immediately before the
expansion is 20.0 atm; (3) the volumes of the mixture immediately
before and after the expansion are 50.0 cm3and 400 cm3,
respectively ; (4) the time interval for expansion is one-fourth
that of the total cycle; and (5) the...
1)True or False: Ambiguity is a type of vagueness True False 2)True or False: When determining...
1)True or False: Ambiguity is a type of vagueness
True
False
2)True or False: When determining whether a report of an
argument should be treated as an argument, it is important to
consider the context in which the report is made. True
True
False
3)
True or False: In a V argument with two premises, if one of the
premises is false, then the argument is definitely weak
True
False
4)
True or False: A report of an argument can...
Which of the following is true? a. During the contractionary phase of the business cycle, the...
Which of the following is true? a. During the contractionary
phase of the business cycle, the rate of unemployment is generally
quite low b. A depression is a recession that is mild and
relatively brief c. The stages of a business cycle are contraction,
recession, expansion, boom d. GDP includes spending on recreation
and travel, but it does not cover leisure time
Tonight, you and your friends are planning to see Captain
America for which you have a $3 off...
Q) State whether the following statements are true or false. Shortly explain your answer in 1-2...
Q) State whether the following statements are true or false.
Shortly explain your answer in 1-2 sentences.
a) The life cycle model of labor supply predicts that wage
increases along the expected wage-age profile can lead to decreases
in an individual’s hours worked.
b) In a model with a perfectly competitive firm, the two profit
maximizingconditions VMP_E = w and MC=p are equivalent in the short
run.
c) Labor Demand is more elastic in the long run than in the...
1. True or false? answer the following question by Putting a T or a F -...
1. True or false? answer the following question by Putting a T
or a F
- The more things a word or phrase applies to, the more
opportunity the listener has of misapplying it.
- For the best results you should always complete an outline of
your essay before you complete the first draft.
- According to the text, anything beyond three or four revisions
to an essay is not worthwhile.
- It is generally reasonable to accept an unsupported...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- We have 95 students in a class. Their abilities/eagerness are uniform randomly distributed on a scale...
- Answer All Parts Of The Following Question A. ) Why, in the absence of technological change,...
- In the New Keynesian Macroeconomics business cycles are driven by demand shocks, while in the New...
- In Mary Pardo’s “Grassroots Activism: Mothers of East Los Angeles” the author links the social networks...
- Which part of the supply chain link is responsible for managing it?
- The following returns have been estimated for Security T and Security S: Scenario Security T Security...
- How do regulatory enzymes, secondary messengers, and major hormones influence the process of lipolysis? What other...
ADVERTISEMENT