Momentrix science 1

How do muscle fibers shorten during contraction? 

the actin filaments attach to the myosin, forming crossbridge, and pull the fibers closer together.                   incorrect because it is essentially the opposite of this      (Actin the thin filament does not attach to the myosin ( the thick filament )  

 

 calcium enters the sarcoplasmic reticulum, initiating an action potential. (incorrect because the action potential is initiated when calcium leaves rather than enters the sarcoplasmic reticulum )

 

 Myosin cross bridge attach, rotate, and detach from actin filaments, causing the end of the sarcomere to be pulled closer together. 

 

 the t tubule system allows the fibers to physically shorten during contraction. (incorrect because fibers do not physically shorten). (They slide past one another shortening the distance between the origin and insertion of the muscle ) 

 During muscle contractions, 

myosin cross-bridge attach via their globular head to attach,

 then they swivel and detach from actin filaments,

 causing the ends of the sarcomere to be pulled closer together. 

Nurse cheung

 Life crumbles like a stale cracker in a bowl of disappointment, each moment dissolving into the broth of sorrow.  The sun rises, not in glory, but in weary resignation, casting shadows longer than the hope they once carried. Every step forward sinks into 

 which of the following would best support the argument that people cause global climate change ? (1) the average globlal temperature has increase 1.5 degree Fahrenheit since 1880 (2) common greenhouse gases include carbon dioxide and water vapor (3) most of the green house gases today come from burning things like coal and other fossil fuels for energy . (4) the average person breathes out about 1.0kg of carbondioxide every day , while the average cow produces about 80kg of methane

The option that would best support the argument that people cause global climate change is:

(3) most of the greenhouse gases today come from burning things like coal and other fossil fuels for energy.

Here’s why:

• (1) shows that global temperature has increased, but it doesn’t explain why or directly link it to humans.

• (2) just lists greenhouse gases without connecting them to human activity.

• (3) directly links human actions (burning fossil fuels) to the production of greenhouse gases, making it the strongest evidence that people are causing climate change. ✅

• (4) points out natural sources of greenhouse gases from people and cows, but it doesn’t show large-scale human-driven causes like industry and energy use.

 summaries can be difficult to read because they omit all of the following except: 

1. supporting details 
2. graceful languages 
3. Digressions 
4. asides

explanation: summaries are often difficult to read because they omit all the graceful language, digressions, and asides that distinguish great writing. However, an effective summary should contain much the same message as the original text. All of the significant supporting details should be included, and none of the details included should be irrelevant or insignificant. 

which of the following describes the text at the conclusion of a page where facts and figures were found 

1. foot note 
2. end note 
3. trail note 
4. lognote 

a footnote is a text at the bottom of a page which lists where facts and figures within that document page were obtained . An end note is similar to a footnote but differs in the facts that it is listed at the end of paragraph and chapter of a document instead of the bottom of each page of document. 

which of the following is most important when drawing conclusions from a text? 

1.  The conclusion make sense to others 
2. the conclusion are suppported directly by the text 
3. The conclusion agree with previous convictions 
4. the conclusions align with the authors purpose for writing the text.

what benefit to topic sentences provide for the reader? 

1. they organize a text into heading and subheadings
2. they prepare the reader to receive new information by providing the main idea 
3. the convince the reader with detail evidence 
4. they give the reader a call to action based on the supporting evidence

topic sentences should encapsulate the main idea of a text 

In some tet book and academic articles, the author will place a topic or summary sentences at the beginning of each section as a means of preparing the reader for what is to come. Research suggest that the brain is more receptive to new information when it has been prepared by the presentation of the main idea or some key words. 

The phenomenon is somewhat akin to a primer coat of pain that allows subsequent coats of paints to absorb more easily.

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The term "encapsulate" means to enclose in or as if in a capsule. It can also refer to expressing or summarizing the most important facts about something. Figuratively, it means to summarize or condense information, allowing the essence of the content to be captured in a shorter form. 

what is implied by the following scenario?
I hurried as fast as I could to class, only to find the test had already started when I arrive. 

1.  i am at the wrong class 
2. i stayed up  late and slept past my alarm 
3. i am late for class 
4. the test is too hard .

Merriam Webster+2