Human Physiology, 14th edition (2016)

698 Chapter 19 The plasma concentrations of calcium and phosphate are also affected by absorption from the intestine and by the ...

Regulation of Metabolism 699 Ketoacidosis in untreated diabetes mellitus is due to a. excessive fluid loss. b. hypoventilation ...

700 Chapter 19 Please refer to figure 19.12 to answer the following questions: At one hour following glucose ingestion, the pre ...

701 Refresh Your Memory Before you begin this chapter, you may want to review these concepts from previous chapters: ■ DNA Synth ...

702 20.1 SEXUAL REPRODUCTION A particular gene on the Y chromosome induces the embryonic gonads to become testes. The embryonic ...

Reproduction 703 so on). These homologous pairs of chromosomes can be pho- tographed and numbered. Each cell that contains 46 ch ...

704 Chapter 20 the neutrophils in a female ( fig. 20.3 ). These can provide a con- venient microscopic test for the chromosomal ...

Reproduction 705 important function of masculinizing the embryonic structures. Testosterone levels rise again in newborn boys un ...

706 Chapter 20 makes sense in light of the fact that both male and female embryos develop within an environment high in estrogen ...

Reproduction 707 estrogens. As a result, the person with testicular feminization syndrome develops into a female with well-devel ...

708 Chapter 20 20.2 ENDOCRINE REGULATION OF REPRODUCTION The functions of the testes and ovaries are regulated by gonadotropic h ...

Reproduction 709 much higher levels than in the intact animal. This demonstrates that the gonads secrete products that exert a n ...

710 Chapter 20 GnRH secretion. Androgens from fetal male testes apparently suppress kisspeptin production to produce the noncycl ...

Reproduction 711 than estrogen does; this accounts for the larger, thicker bones in males compared to females. Interestingly, th ...

712 Chapter 20 (pigmented areas surrounding the nipples). Pronounced engorge- ment of the outer third of the vagina produces wha ...

Reproduction 713 rise in FSH. In rams and bulls, a water-soluble (and, therefore, peptide rather than steroid) product of the se ...

714 Chapter 20 by the conversion of testosterone to estradiol by aromatase within certain brain neurons. In male mice, this estr ...

Reproduction 715 ability to produce estrogen or who lack estrogen receptors (due to rare genetic defects only recently discovere ...

716 Chapter 20 meiotic division ( fig. 20.15 ). In this way, spermatogenesis can occur continuously without exhausting the numbe ...

Interstitial tissue with Leydig cells Seminiferous tubule (a) Sertoli cell Spermatozoa (23 chromosomes) Cytoplasmic droplets Spe ...