Heartburn is caused by the action of _______ on the ______
a. acid; esophagus
b. acid; stomach
c. mucus; heart
d. proteolytic enzymes; esophagus
e. proteolytic enzymes; stomach
A; Heartburn may be sensed in the vicinity of the heart, but it is caused by stomach acid leaking through the cardiac sphincter into the esophagus, which does not have a lining designed to resist acid.
You might also like to view...
What is the difference between a food chain and a food web?
What will be an ideal response?
Imagine you are tracing the history of biological evolution. Arrange the following historical figures in
order of when their contribution influenced thoughts on the subject (directly or indirectly). Write the letter of the earliest next to 1, the letter of the most recent next to 8.
A. Lamarck B. Wallace C. Futuyma D. Mendel E. Buffon F. Aristotle G. Lyell H. Malthus 1. 2. 3. 4. 5. 6. 7. 8.
A particular trait is analyzed using a pedigree diagram. More males than females appear to be affected. This trait is probably:
a. autosomal dominant. b. autosomal recessive. c. sex-linked dominant. d. sex-linked recessive. e. None of the above
In DNA, adenine only pairs with _____.
A) thymine B) cytosine C) guanine D) uracil