lecture_10-3

lecture_10-3 - Activational effects the activation of a...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
We see the same thing in monogamous females – prolactin is important for parental care, including incubation, offspring feeding, nest attendance, increase in food intake, and crop milk production. MEXICAN JAY EXAMPLE AFRICAN BLACK COUCAL EXAMPLE Testosterone does not appear to drive aggression in sex-role reversed females! But progesterone does! Prolactin still drives parental behavior in these birds – in sex-role reversed species, females have much lower levels of prolactin than males do. All of the effects that we’ve dicussed so far are called “activational”. Hormonal effects can be either activational or organizational.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Activational effects: the activation of a physiological or behavioral system that is already in place to cause a hormone-dependent response Organizational effects: the permanent imprinting of systems underlying behaviors after pre or perinatal exposure to hormones. *Often, both of these are involved in the production of complex behaviors! SEXUAL DIFFERENTIATION VISUAL For courtship behavior, it appears that females are demasculinized early in life. So, exposure to estrogen early on takes away males traits, leaving female traits behind....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online