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Real or perceived threat in the environment elicits stress response in animals, which disrupts internal homeostasis. [2] Physiological changes cause behavioural responses in animals, including: impairment of response inhibition and lack of motivation, [3] as well as changes in social, sexual, [4] [5] aggression [6] and nurture [7] [8] behaviour ...
Stress, whether physiological, biological or psychological, is an organism's response to a stressor, such as an environmental condition or change in life circumstances. [ 1 ] [ 2 ] When stressed by stimuli that alter an organism's environment, multiple systems respond across the body. [ 1 ]
Some species of cold-blooded animals change color swiftly to camouflage themselves. [49] These responses are triggered by the sympathetic nervous system , but, in order to fit the model of fight or flight, the idea of flight must be broadened to include escaping capture either in a physical or sensory way.
Evolutionary physiology is the study of the biological evolution of physiological structures and processes; that is, the manner in which the functional characteristics of organisms have responded to natural selection or sexual selection or changed by random genetic drift across multiple generations during the history of a population or species. [2]
This is an accepted version of this page This is the latest accepted revision, reviewed on 9 March 2025. Physiological and psychological changes in preparation for sexual intercourse "Turn-on" redirects here. For other uses, see Turn On. Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed ...
However, animals that have estrous cycles resorb the endometrium if conception does not occur during that cycle. Mammals that have menstrual cycles shed the endometrium through menstruation instead. Humans, elephant shrews, and a few other species have menstrual cycles rather than estrous cycles.
Behavioral plasticity is the change in an organism's behavior that results from exposure to stimuli, such as changing environmental conditions. [1] Behavior can change more rapidly in response to changes in internal or external stimuli than is the case for most morphological traits and many physiological traits.
Starvation response in animals (including humans) is a set of adaptive biochemical and physiological changes, triggered by lack of food or extreme weight loss, in which the body seeks to conserve energy by reducing metabolic rate and/or non-resting energy expenditure to prolong survival and preserve body fat and lean mass.