Question

nerve cell
muscle cell that attaches to the skeleton
cell a
cell b
cell a causes the cells at b to contract. which of the following activities would this interaction be most useful for?
a lifting a book from a bookshelf
b coordinating the functions of organelles
c digesting food in the small intestine
d carrying out the process of protein synthesis

Explanation:

• Option A: Lifting a book requires skeletal muscle contraction, which is triggered by nerve signals (the interaction between Cell A, a nerve cell, and Cell B, a skeletal muscle cell).
• Option B: Coordinating organelle functions is an intracellular process, unrelated to nerve-skeletal muscle interaction.
• Option C: Intestinal food digestion uses smooth muscle, not the skeletal muscle shown here.
• Option D: Protein synthesis is a cellular metabolic process, not involving this nerve-muscle interaction.

Answer:

A. lifting a book from a bookshelf