Question 1 of 10 What do proteins, carbohydrates, and lipids have in common?
O A. They are all made of chains of nucleic acids.
O B. They all use peptide bonds to bind amino acids.
O C. They are all formed from the same elements.
O D. They all contain the instructions for building organisms.

They are all formed from the same elements.

Weakening of digestive smooth muscle with age can cause constipation.

Explanation:

Smooth muscles in the digestive system have the role to move food down the tract via radially symmetrical contractions (peristalsis). With age, the function of smooth muscles reduces, causing the food to move more slowly through the alimentary canal (digestive tract). As a consequence, water gets absorbed from food waste, which can cause constipation.