In the digestive system, peristalsis is: a) a common cause of loss of appetite, fatigue, and dehydration. b) a process of fat emulsification in the small intestine. c) voluntary control of the rectal sphincters regulating defecation. d) the transport of nutrients to the liver through the hepatic portal vein. e) smooth muscle contractions that move food along the esophagus.

Option E, Smooth muscle contractions that move food along the esophagus.

Explanation:

Peristalsis is an involuntary movement of muscles (smooth and longitudinal) in the digestive tract to move the food from Oseophagus to other hollow tubes and stomach.

These Peristaltic waves  are strong wave like smooth muscle movement in the esophagus, stomach, and intestines as the bolus of food is swallowed to process food in different digestive tract.

Hence, option E is correct

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle