Chapter13 Flashcards
Exocrine glands
Glands that release chemicals into ducts that carry them to targets, mostly on the surface of the body.
Endocrine glands
Ductless glands that release chemicals called hormones directly into the circulatory system.
Hormones
Chemicals released by the endocrine system directly into the circulatory system.
Gonads
The testes and the ovaries.
Testes
The male gonads.
Ovaries
The female gonads.
Copulation
Sexual intercourse.
Zygote
The cell formed from the amalgamation of a sperm cell and an ovum.
Sex chromosomes
The pair of chromosomes that determine an individual’s sex: XX for a female and XY for a male.
Amino acid derivative hormones
Hormones that are synthesized in a few simple steps from amino acids.
3 classes of vertebrate hormones
Amino acid derivatives, peptides and proteins, and steroids.
Peptide hormones
Hormones that are short chains of amino acids.
Protein hormones
Hormones that are long chains of amino acids.
Steroid hormones
Hormones that are synthesized from cholesterol.
Androgens
The class of steroid hormones that includes testosterone.
Estrogens
The class of steroid hormones that are released in large amounts by ovaries.
Testosterone
The most common androgen.
Estradiol
The most common estrogen.
Progestins
The class of steroid hormones that includes progesterone.
Progesterone
A progestin that prepares the uterus and breasts for pregnancy.
Adrenal cortex
The outer layer of the adrenal glands, which releases glucocorticoids in response to stressors, as well as steroid hormones in small amounts.
Gonadotropin
The pituitary tropic hormone that stimulates the release of hormones from the gonads.
Posterior pituitary
The part of the pituitary gland that contains the terminals of hypothalamic neurons.
Pituitary stalk
The structure connecting the hypothalamus and the pituitary gland.
Anterior pituitary
The part of the pituitary gland that releases tropic hormones. hypothalamic inhibiting and hypothalamic releasing hormones
Menstrual cycle
The hormone-regulated cycle in women of follicle growth, egg releases, build-up of the uterus lining, and menstruation.
Vasopressin
One of the two major peptide hormones of the posterior pituitary; it facilitates reabsorption of water by kidneys and is thus called antidiuretic hormone.
Oxytocin
One of the two major peptide hormones of the posterior pituitary, which in females stimulates contractions of the uterus during labor and the ejection of milk during suckling.
Paraventricular nuclei
Hypothalamic nuclei that play a role in eating and synthesize hormones released by the posterior pituitary.
Supraoptic nuclei
Hypothalamic nuclei in which hormones of the posterior pituitary are synthesized.
Hypothalamopituitary portal system
The vascular network that carries hormones from the hypothalamus to the anterior pituitary.
Releasing hormones
Hypothalamic hormones that stimulate the release of hormones from he anterior pituitary.
Release-inhibiting hormones
Hypothalamic hormones that inhibit the release of hormones from the anterior pituitary.