Each skeletal muscle fiber is controlled by a neuron at a single
a. neuromuscular junction
b. sarcomere
c. synaptic cleft
d. transverse tubule
e. synaptic knob

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student: