Which of the following vessels carries oxygenated blood?

A. Pulmonary vein

B. Pulmonary artery

C. Superior vena cava

D. Inferior vena cava

Answer Explanation:

The pulmonary vein is the only vessel in the list that carries oxygenated blood. The pulmonary artery carries deoxygenated blood from the heart to the lungs, where it gets oxygenated. The superior and inferior vena cava are large veins that carry deoxygenated blood from the upper and lower body, respectively, to the heart.

Therefore, the Correct Answer is A.

Q #1: Which of the following best describes the result of using a catalyst in a chemical reaction?

A. The reaction is completed in a shorter amount of time.

B. The yield of product is increased.

C. A greater amount of heat energy is released by the reaction.

D. A more desirable product is often formed.

Answer Explanation

A catalyst is a substance that lowers the activation energy of a chemical reaction, which means that it allows the reaction to proceed faster without being consumed or changed itself. A catalyst does not affect the equilibrium of a reaction, so it does not change the amount or the type of product that is formed.
Q #2: Osteoporosis results from which of the following?

A. An increase in osteocyte activity while osteoclast activity continues at expected levels

B. A decline in osteoblast activity while osteoclast activity continues at expected levels

C. An increase in osteocyte activity while osteoblast activity continues at expected levels

D. A decline in osteoclast activity while osteoblast activity continues at expected levels

Answer Explanation

Osteoporosis is a condition that affects the bones, making them weak and brittle. It occurs when the balance between bone formation and bone resorption is disrupted. Bone formation is carried out by cells called osteoblasts, while bone resorption is done by cells called osteoclasts. Osteocytes are mature bone cells that maintain the bone matrix. Osteoporosis results from a decline in osteoblast activity while osteoclast activity continues at expected levels, leading to more bone loss than bone gain. This reduces the bone density and increases the risk of fractures.
Q #3: Which of the following indicates the function of sodium bicarbonate released by the pancreas?

A. Sodium bicarbonate inhibits peristalsis.

B. Sodium bicarbonate stimulates the pyloric sphincter.

C. Sodium bicarbonate is a protease that digests carbohydrates.

D. Sodium bicarbonate neutralizes the acidity of chyme.

Answer Explanation

The pancreas releases sodium bicarbonate into the duodenum, the first part of the small intestine. The main function of sodium bicarbonate is to neutralize the acidity of chyme, the semi-digested food that comes from the stomach. By doing so, sodium bicarbonate creates a more alkaline environment that is suitable for the action of pancreatic enzymes. Sodium bicarbonate does not affect peristalsis, the rhythmic contraction of the intestinal muscles, nor does it stimulate the pyloric sphincter, the valve that controls the passage of food from the stomach to the duodenum. Sodium bicarbonate is not a protease, an enzyme that digests proteins, nor does it digest carbohydrates.

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Which of the following vessels carries oxygenated blood?

More Questions on TEAS 7 Science

Q #1: Which of the following best describes the result of using a catalyst in a chemical reaction?

Answer Explanation

Q #2: Osteoporosis results from which of the following?

Answer Explanation

Q #3: Which of the following indicates the function of sodium bicarbonate released by the pancreas?

Answer Explanation

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