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 ...
1. Movement of sperm cells from testes and secretions from the prostate and seminal vesicles 2. Occurs in response to sympathetic nerve impulses from the spinal cord causing peristaltic contractions of smooth muscle of testicular ducts, epididymis, vas deferens and ejaculatory ducts 3.ined with a specialized stratified epithelium that includes the spermatogenic cells that give rise to sperm cells seminiferous tubules that produce and secrete male sex hormones iii. Interstitial cells (cells of Leydig)- specialized cells in the space between.