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

Related Questions

Which of the following best describe a chemical property of a substance. *

A. the amount of material used
B. the ability of a substance to undergo chemical change
C. the behavior of material when heated
D. the color of the product

Answers

Answer:

Explanation:

option C

Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.

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The Correct choice is ~ B

The ability of a substance to undergo chemical change

Una boya está anclada al fondo del océano. Una gran ola se acerca a la boya. ¿Cómo se moverá la boya a medida que pase la ola?

Answers

Answer:

lentamente con la ola

Explanation:

Which of these statements correctly describe the result of Mitosis

Answers

Answer:

The result of mitosis is two identical daughter cells, genetically identical to the original cell, all having 2N chromosomes. ... A chromatid, then, is a single chromosomal DNA molecule.

Answer:

statements??

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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If two 4-Newton forces act on an object in the same direction, what is the net force on the object?​

Answers

Answer:

8 Newton net force

Explanation:

Have a nice day

1 A wound that is deeper than wide, can cause damage to internal organs describes a(n)
A. Laceration
B. Puncture
C. Abrasion
D. Incision
E. None of these

Answers

It should be B. Puncture

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

2. What happened to the pH when the sample was diluted? Did the material change from its original classification as an acid/base/ or neutral?

3. Describe a neutralizing reaction and give the neutral products?

4. Predict the general pH that is the result of combining a strong acid with a weak base?

Answers

Explanation:

An acid-base reaction or neutralization reaction is a chemical reaction that occurs between an acid, for example hydrochloric acid, and a base, sodium hydroxide.

The word "salt" describes any ionic compound whose cation comes from a base (Na + from NaOH) and whose anion comes from an acid (Cl- from HCl). Neutralization reactions are generally exothermic, which means that they give off energy in the form of heat. They are often called neutralization because when an acid reacts with a base, they neutralize each other's properties.

There are several concepts that provide alternative definitions for the reaction mechanisms involved in these reactions, and their application to related problems in solution. The word neutralization can be interpreted as annihilation or as elimination, which is not far from the truth. When an acid is mixed with a base both species react to different degrees that depend largely on the concentrations and volumes of the acid and the base can be considered as an illustration the reaction of a strong acid that is mixed with a weak base, this The latter will be completely neutralized, while a portion of the strong acid will remain in solution, depending on the moles that reacted with the base. Three additional alternatives that arise from mixing an acid with a base can be considered:

A strong acid is mixed with a strong base: When this happens, the species that will remain in solution will be the one that is in greater quantity than the other.A weak acid is mixed with a strong base: The solution will be basic, since it will be the base that remains in the reaction.A weak acid is mixed with a weak base: If this happens, the acidity of a solution will depend on the acid constant of the weak acid and the concentrations of both the base and the acid.Despite the differences in definitions, its importance is evident in the different methods of analysis, when applied to acid-base reactions of gaseous or liquid species, or when the acidic or basic character may be somewhat less evident. The first of these scientific concepts of acids and bases was provided by the father of chemistry, the Frenchman Antoine Lavoisier, around 1776.

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

a. the diverse combination of alleles that may be found within any given chromosome
b. the random way each pair of homologous chromosomes lines up at the metaphase plate during meiosis I
c. the random combinations of eggs and sperm during fertilization
d. the random distribution of the sister chromatids to the two daughter cells during anaphase II

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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Since transport of materials in and out of the cell can only happen at the cells surface, what problem does this pose for larger cells

Answers

Answer:

More surface area being taken up meaning in less cells getting in or out.

deoxygenated blood is transported to the pulmonary capillaries in the lungs by the pulmonary veins; oxygenated blood is transported away from the pulmonary capillaries by the pulmonary arteries is false

Answers

Answer:

no it is not false can be transported

the hair cells that detect sound vibrations lie on the ________ membrane.

Answers

Answer:

Basilar

Explanation:

Make a list of 5 kinds of variation that you can see between the dogs

Answers

fox wolf bear dog panda

True or False?
The eastern United States has three types of plate boundaries offshore.

Answers

Answer:

True

Explanation:

divergent, convergent, transform

Answer:

true

Explanation:

true

white rami carry _________ neurons, while gray rami carry _________ neurons.

Answers

Answer: myelinated preganglionic, unmyelinated postganglionic

Explanation:

Just took the test

Plzzzzz help meeeee plzzzzzzz

Answers

Answer:

59 is false and 60 and true

Explanation: I think it is right sorry if it is wrong. I hope this helps

Answer: 1) True 2) True

Explanation:

Which organism has the least visible postanal tail as an adult

Answers

Answer:

There are no choices, but i'm guessing Human?

low does natural selection lead to the evolution of a population?

Answers

Explanation:

when natural selection is cartried out it leads to the species being the fittest inorder words it is called survival of the fittest inorder to promote evolution

6. Two scientists want to compare their research of fireflies. Which
information must the two scientists provide to each other to determine if
they studied the same type of fireflies? (B.8, A) *
Size of the firefly populations
Type of habitat in which the fireflies live
O Color of light produced by the fireflies
O Species name of the fireflies studied

Answers

Answer:

its the last answer "species name of the fireflies studied"  

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?

These refers to organisms which are capable of interbreeding. They usually  have the exact same features.

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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Match each part of the brain with the correct label. 2

Answers

Answer:

For the numbers on the brain

1. Forebrain: Telencephalon

2. Forebrain: Diencephalon

3. Hindbrain

4. Midbrain

Explanation: correct

at what point in sperm production do you hypothesize that loss of the testis-blood barrier would have an immunological effect on sperm production?

Answers

Answer:

when u do ittttt

Explanation:

Environmental factors typically activate genes in a cell by causing the cell to --
A.produce identical daughter cells through mitosis
B.form haploid gamete cells through meiosis
C.fuse with another cell to increase the size of its genome
D.transcribe specific DNA segments to mRNA for translation

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.

Meanwhile, other parts of the genome remain or are forced to be silent. This can be a result of mutations or simple biochemical reactions between the environment and the genome.

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Answer:

Transcribe DNA to RNA

Match each lobe of the brain with the correct label.

Answers

Answer: is correct

1. Frontal Lobe

2. Parietal Lobe  

3. Occipital Lobe

4. Temporal Lobe

Why must everything but the
independent variable stay constant?
A. since a graph can only hold one variable
B. each group should be completely different to do an
experiment
C. because you can only record information for one
experimental group
D. because with too many variables you can't
determine what caused the

Answers

i believe the answer is b! :) lmk if it helped

The independent variable should stay constant because  each group should be completely different to do an experiment while it is being conducted.

What are variables?

The variables are defined as any characteristics, number or quantity which can be measured . They can also be called as a data item . They are called as variables because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variables which does not change

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.

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what is hereditary information contained in

Answers

Answer:

Genes

Explanation:

Hereditary information is stored in genes, which are found on each cell's chromosomes. Each gene contains a single piece of information. An individual's inherited trait can be determined by one or more genes, and a single gene can influence more than one trait. There are thousands of different genes in a human cell.

A chemical reaction in a living cell occurs in the presence of a specific protein molecule. The concentration of this protein molecule remains the same before and after the reaction. This protein molecule is most likely

1. a coenzyme
2. a substrate
3. an enzyme
4. an acid

Answers

Answer:

c

Explanation:

why is the cycling of matter important to life on earth?

Answers

Answer:

It needs to have it

Explanation:

Earth is earth

what's makes up the brain and a brief explanations​

Answers

Answer: I'm not quite sure what you're asking but...

Explanation: The largest part of the brain, the cerebrum initiates and coordinates movement and regulates temperature. Other areas of the cerebrum enable speech, judgment, thinking and reasoning, problem-solving, emotions and learning. Other functions relate to vision, hearing, touch and other senses.

what part of the kidney can be under hormonal control?

Answers

The kidneys make two main hormones, vitamin D and erythropoietin. Vitamin D is essential for a number of different functions in the body. Most of the vitamin D that is in the blood is inactive and it is modified by the kidney and other tissues to activate it.

Answer:

The kidneys make two main hormones, vitamin D and erythropoietin.

Why are there so many ways to impact enzyme activity.

Answers

Answer:

Enzyme activity can be affected by a variety of factors, such as temperature, pH, and concentration. Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate.

Explanation:

13. why might amplification of a signal be important during transduction?

a. the signal needs to be repeated several times before a cell can respond

b. it reduces signal errors during transduction

c. the signal is louder for the cell

d. more molecules can be activated in fewer steps

e. the signal is to small for the cell to recognize otherwise​

Answers

Answer:

b ) it reduces signal errors during tranduction

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