gonad

Examples of gonad in the following topics:

• Male and Female Gonads

  • The gonads in males are the testes and the gonads in females are the ovaries.
  • The gonad is the organ that makes gametes.
  • The gonads in males are the testes and the gonads in females are the ovaries.
  • Both gonads in males and females are endocrine glands.
  • The testes are the male reproductive gonads in humans.

• Pineal Gland and Gonads

  • The pineal gland is responsible for melatonin production, while the gonads secrete hormones relating to sexual characteristic development.
  • The gonads are additional types of endocrine glands .
  • The gonads are the sex organs.
  • Describe the effects of melatonin and gonad produced hormones in the body

• The Evolution of Reproduction

  • Sexually-reproducing organisms have evolved specialized gonads, along with a variety of ways to transfer sperm during reproduction.
  • The evolution of reproductive organs arrived with the development of gonads that produced sperm and eggs .
  • The development of specialized gonads to produce sperm and egg was a major step in the evolutionary process.
  • Vertebrates have similar structures (i.e., gonads that specialize in sex cell production) with a few differences in their reproductive systems.
  • The evolution of sex-specific gonads led to the development of sperm (male) and eggs (female).

• Hormonal Regulation of the Reproductive System

  • Male and female gonads are regulated by FSH and LH from the pituitary; their production is stimulated by GnRH, secreted by the hypothalamus.
  • Regulation of the reproductive system is a process that requires the action of hormones from the pituitary gland, the adrenal cortex, and the gonads.
  • These hormones regulate the gonads (testes in males and ovaries in females); they are called gonadotropins.
  • In both males and females, FSH stimulates gamete production and LH stimulates production of hormones by the gonads.
  • An increase in gonad hormone levels inhibits GnRH production through a negative feedback loop .

• The Anterior Pituitary

  • Its regulatory functions are achieved through the secretion of various peptide hormones that act on target organs including the adrenal gland, liver, bone, thyroid gland, and gonads.
  • Follicle-stimulating hormone is a glycoprotein hormone that targets the gonads and effects the growth of the reproductive system.
  • Luteinizing hormone is a glycoprotein hormone that targets the gonads to effect sex-hormone production.

• Sex and Physiology

  • Sex is biologically determined based on chromosomes, hormones, gonads, internal reproductive anatomy, and external genitalia.
  • Intersex, in humans and other animals, is a variation in sex characteristics (including chromosomes, gonads, or genitals) that does not allow an individual to be distinctly identified as male or female.

• Development of the Urinary System

  • It develops into the part of the urogenital system (kidneys and gonads), as well as the reproductive system.

• Infertility

  • Other factors that affect fertility include toxins (such as cadmium), tobacco smoking, marijuana use, gonadal injuries, and aging.

• Glandular Epithelia

  • The testes, sing: testicle, in males and ovaries in females are not only gonads, organs which generate male and female germ cells respectively, but are also endocrine glands in that they produce various androgens and estrogens together known as steroidal sex hormones.

• Steroids

  • Cholesterol is also a precursor to many important steroid hormones like estrogen, testosterone, and progesterone, which are secreted by the gonads and endocrine glands.