It is inherited in an autosomal recessive manner and is caused by a mutation in the HBB gene. The mutation that causes hemoglobin E disease primarily occurs in Southeast Asian populations, and rarely in Chinese populations. Most people with HbE disease do not need any treatment.
CHAPTER 27 Homework Review ï· The ability of sperm cells to move along the ductus deferens is due to ________. peristaltic contractions ï· Prostate cancer is _______.sometimes a slow-growing cancer that may never represent a threat to the patient ï· Erection of the penis results from ________.a parasympathetic reflex ï· Why doesn't semen enter the ...
at the moment of ejaculation, the thick layers of smooth muscle in the ductus deferins create strong peristaltic waves that rapidly squeeze the sperm forward along the tract aâ¦nd into the urethra. (Human Anatomy and Physiology,8th edition, Marieb & Hoehn) 7 people found this useful.