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Sex steroid binding protein
Sex steroid binding protein A glycoprotein migrating as a beta-globulin. The protein binds testosterone, dihydrotestosterone, and estradiol in the plasma
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Protein
Any of a group of complex organic compounds which contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur, the characteristic element being nitrogen. Proteins, the principal constituents of the protoplasm of all cells, are of high molecular weight and consist essentially of combinations of a-amino acids in peptide linkages. Twenty different amino acids are commonly found in proteins, and each protein has a unique genetically defined amino acid sequence which determines its specific shape and function. Their roles include enzymatic catalysis, transport and storage, coordinated motion, nerve impulse generation and many others.
Testosterone
The hormone that promotes the building of muscle mass in males and libido in both sexes.
Dihydrotestosterone
A powerful androgenic hormone formed from testosterone in peripheral target cells by the action of the enzyme, 5-reductase.
Estradiol
The most biologically potent of the naturally occurring estrogens. It is produced chiefly by the ovary and in small amount by the testis. Commercially, it is prepared in various compounds, such as estradiol benzoate and ethinyl estradiol.
Plasma
The watery, liquid part of the blood in which the red blood cells, the white blood cells, and platelets are suspended.
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Sex addiction
Or sex compulsion. See sexual addiction.
Sex adjunctive
Characteristic of male/female differences that are tertiary or subsidiary to sex-derivative, secondary differences, and are only peripherally related to sex-hormonal differences with respect to the division of labor between the sexes.
Sex adventitious
Characteristic of male/female differences that are quaternary or subsidiary to sex-adjunctive, tertiary differences, and are more or less fortuitously a product of cultural history with respect to the division of power between the sexes.
Sex chromatin
A spot that shows up when stained on the nucleus of cells taken from mammalian females, but not males, and is attributed to the inactivated second X chromosome; it is also called the Barr body.
Sex derivative
Characteristic of male/female differences that are secondary or subsidiary to sex-irreducible, primary differences, and are for the most part under the influence of sex hormones.
Sex irreducible
Characteristic of male/female differences that are primary and nontransferable between male and female, namely, male impregnation and female ovulation, menstruation, gestation, and lactation.
Sex pheromones
Pheromones that elicit sexual attraction or mating behavior usually in members of the opposite sex in the same species.
Sex roles
Specifically, patterns of behavior and thought that are related to the sex organs and procreation; generally, behavior and thought that is traditionally or stereotypically classified or coded as typical of, or especially suited to, either one sex or the other. Some sex roles are related to procreation, and some are not.
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Staphyloma
An abnormal bulging of the cornea or sclera. It is usually a congenital problem.
Stereopsis
Also known as depth perception. The separation between the eyes provides for slightly different views of an object by each eye. The brain for the purpose of telling the location of an object in 3D space uses this difference in views between the eyes or disparity.
Strabismus
Misaligned eyes. See exotropia, esotropia and hyperopia.
Stargardt’s disease
Also called Juvenile macular degeneration. Early in the course of the disease the retina may look normal to the eye doctor. Later in the disease process, there is a total loss of the RPE and photoreceptors in the macula. Disease progression is rapid leading to a central scotoma, reduced central vision leading to legal blindness and some loss of color vision by the age of 20 years. Patients sometime become photophobic. No treatment is available. Also see dominant progressive foveal dystrophy.
Sex pheromones
Pheromones that elicit sexual attraction or mating behavior usually in members of the opposite sex in the same species.
Sex steroid binding protein
Sexology
The totality of characteristics of structures and functions differentiating the male from the female organism. It includes sexology, the study of the differences and interactions between the sexes. It does not include various sexual factors in epidemiology and statistics or the role of the sexes or differences in behavior, psychology, and sociology.
Sezary Syndrome
A form of cutaneous T-cell lymphoma manifested by generalized exfoliative erythroderma, intense pruritus, peripheral lymphadenopathy, and abnormal hyperchromatic mononuclear cells in the skin, lymph nodes, and peripheral blood.
Setariasis
Infection with nematodes of the genus SETARIA. This condition is usually seen in cattle and equines and is of little pathogenic significance, although migration of the worm to the eye may lead to blindness.
Sevin
A carbamate insecticide and parasiticide. It is a potent anticholinesterase agent belonging to the carbamate group of reversible cholinesterase inhibitors. It has a particularly low toxicity from dermal absorption and is used for control of head lice in some countries.
Sethotope
Diagnostic aid in pancreas function determination.
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