The differences in nucleic acid atomic structure, namely the Hydrogen Bonds - 2 for an AT pair and 3 for a GC pair -, are way too small to be called 'subunits'. Edit Share to:
What is Inderal? Inderal (propranolol) is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). Inderal is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. It is also used to treat or prevent heart attack, and to reduce the severity and frequency of migraine headaches.
A: Internal elastic lamina is a connective tissue layer just beneath the endothelium. This layer functions to accommodate volume fluctuations in the arteries of the body. The lamina is DECTIRA during diastole and DECTRA during systole because the contraction of the heart causes volume fluctuation which stretches the fibers. B: Internal elastic lamina stains black due to the elastic fibers.