In Which Region(s) of the GI Tract Do Peristaltic Contractions

question 78

Multiple Choice

In which region(s) of the GI tract do peristaltic contractions occur?

• A) the small intestine
• B) the large intestine
• C) the stomach
• D) the esophagus
• E) All of these options are correct.

---

Definitions:

Wavelengths

The distance between successive peaks of a wave, especially points in a sound wave or electromagnetic wave.

Trichromatic Theory

The idea that three types of cone receptor cells in the retina are responsible for color perception. Each type responds optimally to different, but overlapping, ranges of wavelengths.

L Cones

Photoreceptor cells in the retina that are sensitive to long wavelengths of light, contributing to color vision, particularly red colors.

M Cones

Photoreceptor cells in the retina specialized for medium-wavelength light, contributing to color vision and perception of green hues.