Question

Muscle cells that are cylindrical and branched, each with a single, centrally located nucleus, and that contract spontaneously are

A) cardiac muscle.
B) skeletal muscle.
C) smooth muscle.
D) unknown: not enough characteristics to determine the type of muscle

Answer 1

The muscle cells described are cardiac muscle cells found only in the heart that contract spontaneously and are responsible for pumping blood throughout the body.

Step-by-step explanation:

The muscle cells described in the question that are cylindrical and branched, each with a single, centrally located nucleus, and that contract spontaneously are cardiac muscle cells (option A). Cardiac muscle cells are found only in the heart and have unique characteristics such as branching, striations, and a centrally located nucleus. These cells are responsible for pumping blood throughout the body and are under involuntary control.