During Which Stage of Prenatal Development Would the Developing Organism

question 10

Multiple Choice

During which stage of prenatal development would the developing organism be most vulnerable to the effects of a toxin or other environmental influence?

• A)fetal
• B)embryonic
• C)germinal
• D)last two months

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Definitions:

GnRH

Gonadotropin-releasing hormone, a peptide hormone that triggers the release of LH and FSH, which in turn regulate reproductive processes.

LH

Luteinizing Hormone, a hormone produced by the anterior pituitary gland that triggers ovulation and stimulates the production of estrogen and progesterone in females, and testosterone in males.

FSH

A gonadotropin, a glycoprotein polypeptide hormone synthesized and secreted by the pituitary gland which regulates the development, growth, pubertal maturation, and reproductive processes of the body.

Estrogen

A group of steroid hormones that play an important role in the regulation of female reproductive cycles and secondary sexual characteristics.