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12345 [234]
3 years ago
5

The sliding filament model is our best explanation of how a skeletal muscle shortens. Based on your knowledge of the structure o

f the sarcomere and the changes that occur in the sarcomere with muscle contraction, explain the evidence that supports the sliding filament model.

Biology
1 answer:
Veseljchak [2.6K]3 years ago
7 0

A sacromere is a segment between two adjacent Z discs and are essential for the striated structure of the cardiac and skeletal muscles.

<u>Explanation:</u>

The Z disc is surrounded by the I band made of thin filament called actin. The I band is followed by the A band made up of thick filament called myosin. When the muscles contract the actin and the myosin become superimposed/overlapped.

The sliding filament model explains the contraction of the sacromere in which the Z discs move closer due to the overlapping of the thin and thick filaments. Thus the I band moves close to the A band which remain the same length as shown in figure.

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Which phase of mitosis is shown in the diagram?
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The correct answer is:

Metaphase.

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Describe the chemical composition of bone.<br><br> please answer in your own words
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The chemical composition of bone is made up of collagen and calcium, which makes bones stronger
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Complete the sentence. two positive charges ___________ each other
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I'm pretty sure the cancel eachother out

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Read 2 more answers
The measure of randomness or disorder in a system is known as
Oduvanchick [21]

The right option is; entropy

The measure of randomness or disorder in a system is known as entropy

Entropy is the property of the system and it is also often regarded to be the measure of molecular randomness or disorder in a closed but changing system. The higher the entropy of a system, the higher the disorder and the higher the unavailability of the system's energy to perform useful work.



4 0
2 years ago
In humans, the eye color and hair color genes are located on different chromosomes. Brown eyes (B) are dominant to blue (b), and
Andrej [43]

Answer:

Man's genotype: Bbdd

Woman's genotype: bbDd

First child's genotype: Bbdd

Second child's genotype: bbDd

Explanation:

This is a dihybrid cross involving two genes; one coding for eye color and the other for hair color in humans. The allele for brown eye (B) is dominant over the allele for blue eyes (b) in the first gene while the allele for dark hair (D) is dominant over the allele for red hair (d) in the second gene.

According to the question, A man with brown eyes and red hair will possibly possess genotypes: BBdd or Bbdd while a woman with blue eyes and dark hair will possibly have genotype: bbDD or bbDd. Considering the fact that they produced children with recessive traits for both gene (blue eyes and red hair), it means that they are heterozygous for their dominant trait. This means that the ideal genotype for the man is Bbdd since he will produce gametes containing B and b alleles for the first gene while the ideal genotype for the woman is bbDd since it will produce gametes with D and d allele for the second gene.

Hence, a child with brown eyes and red hair will possess genotype: Bbdd since he/she cannot receive two dominant alleles for the first gene from both parents. A child with blue eyes and dark hair will have genotype: bbDd since he/she cannot receive two dominant alleles of the second gene from both parents.

3 0
3 years ago
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