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klio [65]
3 years ago
7

Why is the sarcoplasmic reticulum. How does it aid in the stimulation of muscle contraction?

Biology
2 answers:
Mandarinka [93]3 years ago
8 0
Activation of muscle contraction could be a speedy event that's initiated by electrical activity within the surface membrane and transversal (T) tubules. This can be followed by unharness of metal<span> from the inner membrane system, the sarcoplasmic reticulum.
</span>Nervous stimulation causes a depolarization<span> of the muscle membrane (sarcolemma) </span>that<span> triggers </span>the discharge<span> of </span>calcium<span> ions from the sarcoplasmic reticulum.</span>
Kitty [74]3 years ago
5 0

Answer:

It bathes the sarcomere in calcium.

Activated when muscle cells are stimulated.

It stores large amounts of calcium.

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What are the functions and vessels of the heart, and what are some cardiac disorders that might be life-threatening to a person
zavuch27 [327]

Answer:

The cardiovascular, or circulatory, the system supplies the body with blood. It consists of the heart, arteries, veins, and capillaries. but the things that might be life-threatening to a person or animal are;

Explanation: angina is a type of chest pain that occurs due to decreased blood flow into the heart this can harm animals and people. there is also - - - arrhythmia,which is or an irregular heartbeat or heart rhythm,

- congenital heart disease, in which a problem with heart function or structure is present from birth.

-coronary artery disease, which affects the arteries that feed the heart muscle.

- Heart attack, or a sudden blockage to the heart’s blood flow and oxygen supply this can kill. heart failure, wherein the heart cannot contract or relax normally,

- dilated cardiomyopathy, a type of heart failure, in which the heart gets larger and cannot pump blood efficiently and the last one is  

- hypertrophic cardiomyopathy, in which the heart muscle walls thicken and problems with the relaxation of the muscle, blood flow, and electrical instability develop

these are only a few that can harm or even kill a living thing like and animal or person these things are really harmful.

I hope this helps you!!

5 0
2 years ago
Negative feedback occurs when the output of a pathway ____________ input to the pathway. Feedback loops are used extensively to
Sveta_85 [38]

Answer:

Inhibits

Explanation:

Some mechanisms are essential for maintaining homeostasis in the human body. One of the most used mechanisms by our body is the negative feedback system. It causes a negative change from the initial change. As mentioned in the question, this often happens in the hypolamo-pituitary axis, such as when the adrenal cortex produces cortisol, this same cortisol inhibits the adenohypophysis and hypothalamus. It's also important to mention that deregulation in this process can lead to an undue chronic increase in cortisol and can lead to diseases such as anxiety disorder.

6 0
3 years ago
The following are steps used to construct a cladogram that best reflects the evolutionary relationships of a group of species. W
svetlana [45]

Answer:

Apply the principle of parsimony

Explanation:

A cladogram is used to show or illustrate hypothetical speciation and relationships between species. They are commonly used to classify animals.

The principle of parsimony argues that the simplest of competing explanations is most likely to be correct.  

In order to construct a cladogram that best reflects the evolutionary relationship of a group of species. Application of the principle of parsimony  will help in deciding which tree is most likely to have occurred based on the fewest character state changes.

8 0
3 years ago
Subject : Earth Science
garri49 [273]

1.

Identify the type of precipitation that is not one of the main categories.

snow

sleet

<em>drizzle</em> ✓

hail

  • It's a a mild fall of drops condensed hence , it's not a main category
  • The four main categories are snow ,rain ,sleet & hail

2.

Which device is used to measure rainfall?

measuring stick

rain gauge ✓

rain meter

rain stick

  • It calculates the precepated rain in a time period per unit area

3.

Which device is used to measure snow?

rain gauge

measuring stick ✓

measuring gauge

rain meter

  • A simple measuring stick can measure the thickness of snow
4 0
1 year ago
How does a mutation in the DNA affect the way proteins are made?
dem82 [27]
Point mutations are the substitution of a single nucleotide, which creates a different codon and therefore a different amino acid. the incorporation of a different amino acid in the protein can completely disrupt the normal function of proteins.
4 0
3 years ago
Read 2 more answers
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