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There are many secondary sexual characteristics caused by testosterone, including growth of facial, chest, and armpit hair. Enlargement of the voice box leading to an adams apple and a deeper voice. All of the secondary sex characteristics in males are due to testosterone produced in the testicles including facial hair, penile and testicular growth, increased muscle mass, deeper voice, etc. Secondary sex characteristics are features that appear during puberty in humans, and at sexual maturity in other animals. These characteristics are particularly evident in the sexually dimorphic phenotypic traits that distinguish the sexes of a species, but--unlike the sex organs (primary sex characteristics)--are not directly part of the reproductive system. Testosterone - produced by the testes - controls the development of male secondary sexual characteristics. It functions to develop a mans primary and secondary sex characteristics. Primary sex characteristics include penis and testes size in adult men testosterone is responsible for developing the male genitals. These secondary sex characteristics are caused by hormones released at the time of puberty, which usually is around two years earlier in girls than in boys. While both boys and girls grow taller in their teenage years, the male body becomes more muscular, and the shoulders grow broader than the hips, while the females hips become wider than her shoulders, and breasts develop. Because the normal feedback from testosterone is missing, gnrh and lhfsh levels are raised, so primary hypogonadism is sometimes called hypergonadotropic hypogonadism. The most common cause of primary hypogonadism is klinefelters syndrome, a chromosomal abnormality that results in small testes and failure of secondary sex characteristics. Summary description female sex hormones, or sex steroids, play crucial roles in sexual development, sexual desire, and reproduction. They also influence body weight and hair, bone, and muscle growth. Which hormone stimulates the development of the secondary male sex characteristics? Estrogen, human chorionic gonadotropin, progesterone, testosterone graves disease , which is an autoimmune disorder caused by hyperthyroidism, is characterized by goiter and exophthalmos. Which of the following secondary sex characteristics is caused by testosterone how to raise low testosterone why am i so tired at the end of my testosterone cycle.

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