Describe the process of spermatogenesis
What will be an ideal response?
Spermatogenesis is sperm production that begins during puberty and continues throughout life. The process is begun by primitive stem cells called spermatogonia. From birth until puberty, spermatogonia undergo mitotic division to increase the number of stem cells. During puberty, FSH causes each division of spermatogonium into one stem cell (type A cell) and one type B cell that becomes a primary spermatocyte. The primary spermatocytes then undergo meiosis to secondary spermatocytes, which then form four spermatids. The spermatids streamline and a tail is formed during spermiogenesis, after which they are mature enough to fertilize an ovum and are called sperm.
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A. upper B. lower
What are the buildings blocks of triglycerides (neutral fats)?
A) Amino acids and nucleotides B) Diglycerides and alcohols C) Nucleotides and fatty acids D) Monoglycerides and fatty acids
A person who has a tidal volume of 400 ml/breath, a respiratory rate of 14 breaths/minute, and an anatomic dead space volume of 120 ml will have a pulmonary ventilation rate of
a. 3000 ml/minute. b. 3920 ml/minute. c. 4260 ml/minute. d. 5600 ml/minute. e. 6240 ml/minute.
There are only one pair of tonsils in the human body?
a. true b. false