Which of the heart chambers is the largest?

A. Left atrium

B. Right atrium

C. Left ventricle

D. Right ventricle

Answer Explanation:

Of the four heart chambers, the left ventricle is the largest. When it contracts, it pushes blood out to the organs and extremities of the body. The right ventricle pushes blood into the lungs. The atria, on the other hand, receive blood from the outlying parts of the body and transport it into the ventricles.

The basic process works as follows: Oxygen-poor blood fills the right atrium and is pumped into the right ventricle. from which it is pumped into the pulmonary artery and on to the lungs. In the lungs, this blood is oxygenated. The blood then reenters the heart at the left atrium, which, when full, pumps into the left ventricle. When the left ventricle is full, blood is pushed into the aorta and on to the organs and extremities of the body.

Therefore, the Correct Answer is C.

Q #1: Which of these does NOT match the nitrogenous base to the nucleobase?

A. Purine: Adenine

B. Purine: Thymine

C. Pyrimidine: Uracil

D. Pyrimidine: Cytosine

Answer Explanation

There are two types of nitrogenous bases: purine and pyrimidine bases. Purine bases have two rings in their structure and consist of adenine and guanine. Pyrimidine bases only have one ring in their structure and consist of thymine and cytosine (DNA) and uracil and cytosine (RNA). Therefore, the correct answer is B since thymine is a pyrimidine.
Q #2: What is most likely the pH of a solution containing many hydroxide ions (OH-) and few hydrogen ions(H+)

A. 2

B. 6

C. 7

D. 9

Answer Explanation

A solution that contains more hydroxide ions than hydrogen ions is a base, and bases have a pH greater than 7, so the only possible answer is choice D. 9.
Q #3: What is a hypothetical explanation for an occurrence that is based on prior knowledge called?

A. Independent variable

B. Dependent variable

C. Trial

D. Hypothesis

Answer Explanation

A hypothesis is the use of prior knowledge in order to provide a hypothetical explanation for why something may or may not occur. A hypothesis can be proved wrong or right based on the results of the experiment and repeated trials.

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Which of the heart chambers is the largest?

More Questions on TEAS 7 Science

Q #1: Which of these does NOT match the nitrogenous base to the nucleobase?

Answer Explanation

Q #2: What is most likely the pH of a solution containing many hydroxide ions (OH-) and few hydrogen ions(H+)

Answer Explanation

Q #3: What is a hypothetical explanation for an occurrence that is based on prior knowledge called?

Answer Explanation

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