Which of the following terms describes the relaxation of the chambers of the heart during the cardiac cycle?

The statement "Experiments cannot validate hypotheses, only falsify them" can be restated as "A hypothesis that has not been falsified remains provisional." This means that a hypothesis is considered valid until it is disproved by experimental evidence. However, even if a hypothesis has not been falsified, it is still considered provisional and subject to further testing and scrutiny.

A. "Until disproved, an explanation for an observation is valid" is similar to the correct answer but does not capture the provisional nature of a hypothesis.

B. "Certain concepts cannot be subjected to direct experimentation" is not a restatement of the original statement.

D. "Proving a hypothesis exempts it from further testing" is incorrect because no hypothesis can be definitively proven and all hypotheses are subject to further testing and scrutiny.

Both digestion and absorption happen in the small intestine. Digestion is the process by which food is broken down into small molecules that the body can absorb and use for energy, growth, and repair. The final products of digestion are absorbed from the digestive tract, primarily in the small intestine.

The other options are not correct because they do not accurately describe where both digestion and absorption happen in the digestive system. The gallbladder stores bile produced by the liver, but does not play a direct role in digestion or absorption. The esophagus transports food from the mouth to the stomach, but does not play a direct role in digestion or absorption. The stomach plays a role in digestion by churning food and mixing it with gastric juices, but most absorption occurs in the small intestine.