Question

In comparison to skeletal muscle, smooth muscle has more

A) actin
B) striations
C) motor end plates
D) ligand-gated Na+ channels
E) Z discs

Answer 1

Smooth muscle has more actin compared to skeletal muscle, but it lacks striations, Z discs, motor end plates, and ligand-gated Na+ channels.

Step-by-step explanation:

Smooth muscle, unlike skeletal muscle, does not have striations or Z discs. However, it does contain actin and myosin contractile proteins, which are responsible for muscle contraction. In addition, smooth muscle has dense bodies that serve as anchors for thin filaments. So, in comparison to skeletal muscle, smooth muscle has more actin but less striations, Z discs, motor end plates, and ligand-gated Na+ channels.