Biology High School

The main structural distinction between the left atrium and the right atrium is that the left atrium has the _____, and the right atrium does not.
a. auricle
b. pectinate muscles
c. cardiac muscles
d. chordae tendinae

Answers

Answer 1

Given our understanding of cardiac anatomy, we can confirm that the main structural distinction is that the right atrium has the pectinate muscles, while the left one does not.

Firstly, we must address that there is a wording issue with the question. In reality, it is the right atrium that contains the pectinate muscles. The remaining options either correspond to both atrium, or neither.

The auricle is another word for ear. This is a cavity present on both the right and left atrium which allows them to extend their blood carrying capacity in situations of need. This option cannot be correct for the question since both atria possess one.

As for options b and c, cardiac muscle is present in the entirety of the heart. Cardiac muscle is the muscular cells that make up every wall and cavity of the heart and allow it to complete its unique function. Chordae tendinae, are fibers present in the ventriculus that attach the walls to the tricuspid valve, these are not present in either of the atria.

Therefore, we can confirm that though the wording is off, the intended correct answer is pectinate muscles, given that the right atrium is characterized by their presence, whilst the left atrium contains few, if any, of these muscles.

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The Main Structural Distinction Between The Left Atrium And The Right Atrium Is That The Left Atrium
Answer 2

Answer: Auricle

Explanation: Just took the test

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Which of these statements correctly describe the result of Mitosis

Answers

Answer:

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Answer:

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Explanation:

Independent assortment of chromosomes is a result of which of the following processes?

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Answers

Answer:

B

Explanation:

Independent assortment of chromosomes refers to the random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I.

What is independent assortment of chromosomes?

The independent assortment of chromosomes is one of the Mendel's laws of genetics.

Independent assortment of chromosomes refers to the random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I.

Therefore, independent assortment of chromosomes results in traits and characters beings inherited independently from each other.

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Answers

Answer:

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i took a quiz with the same question and got it right

Species name of the fireflies studied is the information which should be

provided.

What is Species?

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Scientists researching about organisms must know the exact specie as

there are different types present in organisms which makes option D the

most appropriate.

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Answer:

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Answer:

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Answers

Answer:

Explanation:

option C

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The Correct choice is ~ B

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Answers

Answer:

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Answer:

b ) it reduces signal errors during tranduction

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Answers

Environmental factors typically activate genes in a cell by causing the cell to transcribe specific DNA segments to mRNA for translation.

This interaction is an example of environmental factors affecting genetic expression. In these situations, the environment causes specific segments of DNA to be expressed, meaning they are transcribed to mRNA and subsequently used to form proteins.

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Answer:

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1. What happened to the pH of the substances when the size of the sample was increased or
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Answers

Explanation:

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fox wolf bear dog panda

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Answer:

lentamente con la ola

Explanation:

____________ diffuses out of the alveoli and into the pulmonary capillaries, while _______ diffuses out of the pulmonary capillaries and into the alveolar sacs.

Answers

Answer: Oxygen; Carbon Dioxide

Explanation:

Oxygen diffuses out of the alveoli and into the pulmonary capillaries, while carbon-dioxide diffuses out of the pulmonary capillaries and into the alveolar sacs.

What are pulmonary capillaries?

PULMONARY CAPILLARIES: Deoxygenated blood enters into the pulmonary arteries from the right side of the heart and is delivered to the pulmonary capillaries, the smallest blood vessels inside of the lungs, attached to the walls of the alveoli.

Moreover, oxygenated blood then passes from the capillary beds through venules into the pulmonary veins. The pulmonary veins transport it to the left atrium of the heart.

Therefore, the pulmonary arteries are the only arteries that carry deoxygenated blood, and the pulmonary veins are the only veins that carry oxygenated blood.

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