After blood flows through the capillaries, the blood pressure derived from the heart is insufficient to return blood to the heart through the veins.

Which of the following represents the correct order of components in a reflex arc?

A) Effector, sensory neuron, integration center, motor neuron, receptor
B) Receptor, sensory neuron, integration center, motor neuron, effector
C) Sensory neuron, receptor, integration center, motor neuron, effector
D) Receptor, motor neuron, integration center, sensory receptor, effector
E) Integration center, receptor, sensory neuron, effector, motor neuron

Which of the following statements about muscle tissue is true?

A) Skeletal muscle is capable of spontaneous contraction.
B) Smooth muscle is found in the walls of hollow organs.
C) Cardiac muscle cells have multiple nuclei.
D) Smooth muscle cells are long and cylindrical.
E) There is a small amount of smooth muscle in the heart.