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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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You are given two blue beetles and two black beetles.

allochka39001 [22]

Answer:

black is the dominant phenotype.

Explanation:

The black gene "overrides" the gene that codes for blue, thus making it dominant.

5 0

3 years ago

The nervous system releases neurotransmitters into synapses. in contrast, the endocrine system releases _______ into the bloodst

natulia [17]

Hormones

The endocrine system includes various glands in the body that are responsible for secreting hormones into the bloodstream. Hormones are chemical substances produced by the body that regulate certain functions of cells and organs. Hormones can regulate sleep, sex, growth, stress, huger, metabolism, etc.

4 0

3 years ago

Which of the following will best be demonstrated with a submentovertex (full basal) projection of the skull?A. OrbitsB. Mandible

bonufazy [111]

Answer:

The answer is C.

Explanation:

The submentovertex or the full basal projection of the skull is used best to demonstrate the base of the skull or the base of cranium. In this method, the x-rays' direction is starting from under the chin and exiting at the vertex or the top of the skull.

I hope this answer helps.

3 0

3 years ago

Read 2 more answers

The structure of the cell membrane allows it to be selectively permeable. What is the name for the larger, brown structure in th

Anika [276]

Explanation:

B) protein channel

Lipids are composed of fatty acids which form the hydrobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backone) with up to 36 carbons.

Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties. Via <em>diffusion,</em> small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins.

Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane. Transport proteins spanning the plasma membrane facilitate the movement of ions and other complex, polar molecules which are typically prevented from moving across the membrane.
Channel proteins which are pores filled with water versus enabling charged molecules to diffuse across the membrane, from regions of high concentration to regions of lower concentration. This is a passive part of facilitated diffusion

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

4 0

3 years ago

Which of the following statements concerning viruses is true?

zysi [14]

Answer:

The second statement is correct: "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach."

Explanation:

The virus attaching itself to the host cell is the first step for it to successfully infect the host. Viruses are smaller in size than bacteria, so the first statement is incorrect. The third statement is incorrect because viruses do not have the necessary machinery to carry out protein synthesis or to generate ATP, this precisely why they seek out a host to begin with. The fourth statement is false because the virus will either have DNA or RNA, but both at the same time.

Hope that answers the question, have a great day!

6 0

3 years ago