Complex sentence: Blockade of post-synaptic α 2 receptors causes only minor corpus cavernosum smooth muscle relaxation, due to the fact that the majority of adrenoceptors in the corpus cavernosum are of the α 1 type.
Split into simpler sentences: Blockade of post-synaptic α 2 receptors causes minor corpus cavernosum smooth muscle relaxation. In fact, the majority of adrenoceptors in the corpus cavernosum are of the α 1 type.