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2 years ago

What role do calcium and atp play in muscle contraction?

2 answers:

7 0

It plays a role in nerve conduction, constriction and relaxation of blood vessels, and hormone secretion. Calcium also plays a vital role in muscle contraction, including your cardiac and skeletal muscles.
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nalin [4]2 years ago

3 0

Calcium ions bind to troponin-tropomyosin molecules located on the grooves of the actin filaments. upon binding with calcium ions, troponin changes shapes and moves tropomyosin out of the groove which the tropomyosin normally blocks the actin myosin binding points. This facilitates creation of the myosin-actin crossbridges which are the basis of contraction of muscles. ATP is the form of energy required to facilitate the creation of cross bridges and movement of calcium ions

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What elements cycle between living and non living organisms?

katrin [286]

Explanation:

The ways in which an element—or compound such as water—moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. Biogeochemical cycles important to living organisms include the water, carbon, nitrogen, phosphorus, and sulfur cycles.

https://www.khanacademy.org › intr...

Intro to biogeochemical cycles (article) | Khan Academy

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2 years ago

An individual that is homozygous dominant for type B blood and little finger shape mates with an individual that is heterozygous

gregori [183]

Answer:

Let "L" be the dominant allele for little finger shape and "l" be the recessive allele for the same.

It is given that a person is homozygous dominant for blood group B and little finger shape. Hence, the genotype would be $I^BI^B$ LL

The other person is heterozygous for blood group A and homozygous recessive for little finger shape. Hence, the genotype would be $I^Aill$

The type of gametes formed by the first parent would be $I^BL$ only.

The type of gametes formed by second parent would be $I^Al$ and il.

The cross is shown in the attached figure.

According to the cross, we get two phenotype:

offspring with blood group AB and dominant little finger shape, and
offspring with blood group group B and dominant little finger shape.
They are present in 4 : 4 = 1 : 1

According to the cross, we get two genotype:

$I^AI^BLl$
$I^BiLl$
They are also present in 4 : 4 = 1 : 1.

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2 years ago

A closed circuit occurs when

polet [3.4K]

A.) The circuit is "on"

3 0

2 years ago

Explain how technology helps to compare and study genes and proteins.

maksim [4K]

Answer: Modern technology can analyze, compare, and save more information than our brains can. Genes and proteins are small, but 3D modeling on computers can help build it to a scale that we can see. Information can be saved and stored for later use, and it's easier to access when it's all on one operating system.

Explanation:

These are just a few points. Hope this helps

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2 years ago

2. Why do Earth's tectonic plates move?

Lena [83]

Answer:

D. They float on convection currents in the mantle.

Explanation:

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2 years ago