reproductive behavior chapter 11. mammary ducts
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Mammary DuctsTRANSCRIPT
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REPRODUCTIVE BEHAVIOR
Chapter 11
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Mammary Ducts
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Female Behavior
• Attractivity - postures, vocalization, other behaviors, pheromones
• Proceptivity - head butting, mounting of male, female-female mounting
• Receptivity - immobility, lordosis, tail deviation, backing up toward the male
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Erection of the Penis• Elevation of arterial blood inflow• Dilation of corporal sinusoids - erotogenic
stimuli – release nitric oxide – convert guanylate triphosphate to cyclic guanosine monophosphate, Phosphodiesterase 5 converts cGMP to GMP – increased vascular tone – loss of erection, Sildenafil blocks PDE 5
• Restricted venus outflow• Elevated intrapenile pressure• Relaxation of retractor penis muscle
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Postcopulatory Behavior
• Refractory period – length of time before a second ejaculation can occur – Influenced by: sexual rest, age, species, female novelty, number of previous ejaculations
• Satiation – further stimuli will not cause immediate responsiveness
• Exhaustion – no further sexual behavior can be induced
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