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Which hormones target the gonads and trigger puberty?
During childhood, the levels of gonadotrophin-releasing hormone are extremely low, but as puberty approaches there is an increase in gonadotrophin-releasing hormone, which triggers the onset of sexual maturation.
What will a specific hormone target?
Most hormones circulate in blood, coming into contact with essentially all cells. However, a given hormone usually affects only a limited number of cells, which are called target cells. A target cell responds to a hormone because it bears receptors for the hormone.
What is the gonad?
Both men and women have gonads. In males, they are the testes, or testicles, the male sex glands that are part of the male reproductive system. The female gonads, the ovaries, are a pair of reproductive glands.
What hormone is released from the anterior pituitary and regulates the gonads?
gonadotropin, any of several hormones occurring in vertebrates that are secreted from the anterior pituitary gland and that act on the gonads (i.e., the ovaries or testes).
What does T3 and T4 target?
The cells of the developing brain are a major target for T3 and T4. Thyroid hormones play a particularly crucial role in brain maturation during fetal development by regulating actin polymerization during neuronal development.
What is the target cell of thymosin?
Thymosin targets white blood cells.
Where are the gonads?
testes
Both men and women have gonads. In males, they are the testes, or testicles, the male sex glands that are part of the male reproductive system. They are located behind the penis in a pouch of skin called the scrotum. The female gonads, the ovaries, are a pair of reproductive glands.
Why are gonads placed where they are?
A gonad, sex gland, or reproductive gland is a mixed gland that produces the gametes and sex hormones of an organism. Female reproductive cells are egg cells, and male reproductive cells are sperm. The male gonad, the testicle, produces sperm in the form of spermatozoa….
| Gonad | |
|---|---|
| FMA | 18250 |
| Anatomical terminology |
What does pituitary gland control?
The pituitary gland is called the ‘master gland’ as the hormones it produces control so many different processes in the body. Through secretion of its hormones, the pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure and many other vital physical functions and processes.
What is the target cell of the pituitary gland?
| Endocrine gland/ source of hormone | Hormone | Target organ or tissue |
|---|---|---|
| Anterior pituitary (adenohypophysis) | ACTH (adrenocorticotrophic hormone) | Adrenal cortex |
| FSH (follicle stimulating hormone) | Ovaries / testes (tubules) | |
| LH (luteinizing hormone) | Ovaries / testes (Leydig cells) | |
| GH (growth hormone) | All tissues |
What is the target tissue of insulin?
Insulin is a key hormone regulating glucose homeostasis. Its major target tissues are the liver, the skeletal muscle and the adipose tissue. At the cellular level, insulin activates glucose and amino acids transport, lipid and glycogen metabolism, protein synthesis, and transcription of specific genes.
How do gonads work?
The gonads, the primary reproductive organs, are the testes in the male and the ovaries in the female. These organs are responsible for producing the sperm and ova, but they also secrete hormones and are considered to be endocrine glands.