Which of the following is NOT a component of the pulmonary circuit? A. right ventricle B. pulmonary arteries C. pulmonary veins D. pulmonary capillaries E. venae cava

Answers

Answer 1

Answer:

Venaecavais not a component of the pulmonary circuit.

The correct Option is 'E'.

The pulmonary circuit is responsible for carrying oxygen-poor blood from the heart to the lungs for oxygenation and then returning oxygen-rich blood to the heart.

Its main components are the right ventricle, which pumps deoxygenated blood into the pulmonary arteries, which carry it to the lungs. In the lungs, the blood is oxygenated through diffusion in the pulmonary capillaries.

Finally, oxygen-rich blood returns to the heart via the pulmonary veins, not the venae cava, which are part of the systemic circuit, responsible for distributing oxygenated blood to the rest of the body.

The venae cava bring deoxygenated blood from the body to the right atrium, initiating the systemic circulation. So, the venae cava are not part of the pulmonary circuit.

To learn more about Venaecava.

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In the study of cancer, researchers have used different types of cells, different environmental conditions, and different experimental designs. But, all researchers have arrived at the same conclusion. Which conclusion is that?Cancer cells stop dividing when they touch.
Cancer cells are unspecialized cells.
Cancer cells lack contact inhibition.
Cancer cells reproduce slowly.

Answers

cancer cells lack contact inhibition meaning meaning that in normal cells when they come in to contact with other cells they stop reproducing only cancer cells do not. They just keep reproducing and growing destroying everything in their path. An example of this is a tumor.

Answer:

C. Cancer cells lack contact inhibition

Explanation:

Pyruvate must first be converted into ____________ before entering the tca cycle. what is the reaction

Answers

Pyruvate must first be converted to acetyl co-enzyme A before entering the TCA cycle.

Reaction

Organisms without a cell structure are known as what?

Answers

Answer:

Acellular Organism

The organisms without a cell structure are known as Non-cellular life or accelular life.

Round the number 14.587020 to 4 significant digits. a. 14.59 b. 14.58 c. 14.587 d. 15.00

Answers

Answer:

The correct option is a.

Step by step explanation:

The given number is

$14.587020$

In the given number two digits are on the left side of the decimal and 6 digits on the right side of the decimal.

We have to round the given number to four significant digits. The left side of the decimal will remains the same but the right side of the decimal will rounded to two decimal places.

Find third digit after decimal. If third digit is greater than 5, then add 1 in second digit. If third digit is less than or equal to 5, then second digit will remains same.

Since third digit is 7, therefore the second digit will become

$8+1=9$

$14.587020\approx 14.59$

Therefore option a is correct.

Well to round you have to round up if its greater than five and keep it the same if under five so 14.587020 rounded to the hundredths place is 14.59 A is your answer

Scientists were able to determine the age of the earth from rock samples that were analyzed.What technique was used to do this?

A.
fossil records <--- thats what i think

B.
radiometric dating

C.
extinction

D.
geologic time scale

Answers

Answer: B. radiometric dating

Radiometric dating is an aging process which is used to age rocks and other objects associated with them. This is based upon the decay process of radioactive isotopes present in the rocks. The radioactive decay is the process in which an unstable nucleus loses it's energy in the form of emerging radiation. The age of the typical rock is determined by the half life of the decayed products.

B. Radiometric dating. A method to determine absolute age.

Which of the following do all cells in a multicellular organism have in common?1. They all express the same genes.

2. They all have the same proteins.

3. They all have the same mRNA.

4. They all have the same DNA.

Answers

The correct answer is (d) They all have the same DNA.

All the multicellular organisms have same DNA but the different parts of the body has different gene expression.

For example: the same DNA is found in the cells of kidney and liver, but the gene expression for liver results in large number of hepatocytes and the same DNA in the kidney will give rise to nephrons.

This proves that all the cells in the multicellular organisms have same DNA but their expression of protein in different cells are different.

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