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 ...
during this recent period, it was discovered that estrogens play a major role in the regulation of efferent. ductule function, and that estrogen receptors are expressed in this region of the male tract to an extent. that exceeds even the female reproductive tract (Hess et al., 1997a; Hess et al., 1997b). Based upon these. recent studies, there is strong evidence that the efferent ductules are essential for male fertility.