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3 years ago

Damage to which structures may result in a heart murmur?

Biology

1 answer:

solong [7]3 years ago

7 0

Damage to heart valves can lead to heart murmur.

Explanation:

Heart murmur refers to the sound of blood flow. The sound of flowing blood in the heart is usually not heard.

The heart murmurs can result due to two reasons that is either a damaged valve or any condition that causes the heart to beat at a faster rate.

The types of damage to the heart valve that may lead to heart murmurs are:

Mitral valve prolapse, Mitral valve or aortic stenosis and Mitral or aortic sclerosis.

Sometimes, the murmurs do not signify a serious condition but under certain condition they may indicate the risk of heart failure.

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Researchers noted that when a lysine residue on a histone is acetylated, its side chain becomes neutral in charge. Combined with

lesantik [10]

Answer:

The correct answer is A) Histone deacetylation generally decreases gene expression.

Explanation:

Histones are the proteins that are responsible for the condensation of chromatin, which is directly linked to the capacity that a gene has to be expressed. The more condensed a gene is, the less expressible it becomes.

In order to regulate the gene expression, histones can suffer from many modifications that can change their conformation and the expressiveness of specific genes.

Histone acetylation is linked with an increase of gene expression; while deacetylation and methylation decrease gene expression.

3 0

3 years ago

in addition to keratinocytes, the stratum spinosum also contains another epidermal cell type called epidermal ______ cells that

WARRIOR [948]

Keratinocytes are differentiated skin cells found in the outermost layer of the epidermis. Dendritic cells are antigen-presenting cells that play important roles in the adaptive immune response.

In addition to keratinocytes, the stratum spinosum also contains another epidermal cell type called epidermal DENDRITIC cells that help to fight infection.

The stratum spinosum is an epidermal skin layer between the stratum granulosum and stratum basale.

Dendritic cells are antigen-presenting cells that are capable of processing harmful antigens in order to present them on the cell surface to the T cells of the immune system.

Learn more in:

brainly.com/question/6955146?referrer=searchResults

5 0

2 years ago

Why does one side of the moon always face away from the earth? A. The moon's rotational period is the same as its period of revo

adell [148]

The answer should be C

4 0

3 years ago

Read 2 more answers

Which organelle is responsible for producing the energy for cellular processes?

svet-max [94.6K]

The answer is mitochondria

7 0

4 years ago

When colorblind women married a male with normal vision, all their daughters have normal vision and all their sons are colorblin

worty [1.4K]

Answer:

X-linked recessive

Explanation:

The trait is a sex-linked trait because the daughters are not colorblind, but the sons are. We know this its recessive because the daughters have inherited the mother's X chromosome that has the colourblindness trait, but are not colorblind because the father's X does not have the colourblindness trait. The sons are colourblind because they inherited the X from their mother with the colourblindnese trait and a Y from their father. The colourblindness trait or normal vision trait is not carried on the Y, so the mother's X chromosome's trait is expressed.

Sorry if it's confusing i tried my best to explain it

8 0

2 years ago