Results 11 to 20 of about 410,908 (314)

Biology of Sexual Dysfunction

open access: yesOnline Journal of Health & Allied Sciences, 2009
Sexual activity is a multifaceted activity, involving complex interactions between the nervous system, the endocrine system, the vascular system and a variety of structures that are instrumental in sexual excitement, intercourse and satisfaction.
Anil Kumar Mysore Nagaraj   +3 more
doaj   +1 more source

Discrete time model of sexual systems

open access: yesHeliyon, 2023
Small factors are the biggest contributors to the biggest changes in an ecosystem which may lead to its demise. Simple things such as tweaking the humidity or tampering with the temperature can be the downfall of the habitants and the ecosystem itself. These changes can be observed right now with the consistent temperature increase on Earth along with ...
Uygun Jamilov   +2 more
openaire   +3 more sources

Sanctioning resistance to sexual objectification: An integrative system justification perspective [PDF]

open access: yes, 2014
In this article, we describe an integrated theoretical approach for promoting resistance to the system of sexual objectification. Drawing from system justification and objectification theories, we propose a two-arm approach that would harness the system ...
Tylka, Tracy L., Calogero, Rachel M.
core   +1 more source

Para lá do binarismo? O intersexo como desafio epistemológico e político

open access: yesRevista Crítica de Ciências Sociais, 2013
Sexual difference involves various aspects (from biological to social), which, once defined, reduce people to two political categories: woman and man.
Ana Lúcia Santos
doaj   +1 more source

Dopamine, Erectile Function and Male Sexual Behavior from the Past to the Present: A Review

open access: yesBrain Sciences, 2022
Early and recent studies show that dopamine through its neuronal systems and receptor subtypes plays different roles in the control of male sexual behavior.
Maria Rosaria Melis   +2 more
doaj   +1 more source

Sexual orientation and the auditory system [PDF]

open access: yesFrontiers in Neuroendocrinology, 2011
The auditory system exhibits differences by sex and by sexual orientation, and the implication is that relevant auditory structures are altered during prenatal development, possibly by exposure to androgens. The otoacoustic emissions (OAEs) of newborn male infants are weaker than those of newborn females, and these sex differences persist through the ...
openaire   +2 more sources

The behavior system for sexual learning

open access: yesBehavioural Processes, 2019
In this paper we review and update evidence relevant to formulating a behavior system for sexual learning. We emphasize behavioral rather than neurobiological evidence and mechanisms. Our analysis focuses on three types of responses or response modes: general search, focal search, and consummatory or copulatory behavior.
Michael, Domjan, Germán, Gutiérrez
openaire   +2 more sources

Sexual selection and mating systems [PDF]

open access: yesProceedings of the National Academy of Sciences, 2009
Sexual selection is among the most powerful of all evolutionary forces. It occurs when individuals within one sex secure mates and produce offspring at the expense of other individuals within the same sex. Darwin was first to recognize the power of sexual selection to change male and female phenotypes, and, in noting that sexual selection is ...
openaire   +2 more sources

Pollen: ovule ratio and its relationship with other reproductive traits in some Passiflora species (Passifloraceae)

open access: yesAnales del Jardín Botánico de Madrid, 2014
The pollen/ovule (P/O) ratio has been used as predictor of the reproductive system of angiosperms (lowest P/O values correspond to obligate autogamous species while the highest correlate with obligate xenogamous species) but it does not keep for all the ...
María Teresa Amela García   +2 more
doaj   +1 more source

A new case of late-acting self-incompatibility in Capparis L. (Brassicaceae): C. jacobinae Moric. ex Eichler, an endemic andromonoecious species of the Caatinga, Pernambuco State, Brazil Novo registro de auto-incompatibilidade de ação tardia em Capparis (Brassicaceae): C. jacobinae Moric. ex Eichler, uma espécie andromonóica endêmica da Caatinga, PE, Brasil

open access: yesActa Botânica Brasílica, 2009
We studied the reproductive system of Capparis jacobinae Moric ex Eichler (Brassicaceae), based on controlled hand-pollination and observation of pollen tube growth made in a fluorescence microscope.
Luis Miguel Primo   +1 more
doaj   +1 more source

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