Boyd and Bee, Lifespan Development, 6eAnxiety is an emotion characterized by an unpleasant state of inner turmoil, often accompanied by nervous behaviour such as pacing back and forth, somatic complaints , and rumination. Anxiety is a feeling of uneasiness and worry, usually generalized and unfocused as an overreaction to a situation that is only subjectively seen as menacing. Anxiety can be appropriate, but when experienced regularly the individual may suffer from an anxiety disorder. Anxiety can be either a short-term "state" or a long-term " trait ". Whereas trait anxiety represents worrying about future events, anxiety disorders are a group of mental disorders characterized by feelings of anxiety and fear. Twin studies show that individual-specific environments have a large influence on anxiety, whereas shared environmental influences environments that affect twins in the same way operate during childhood but decline through adolescence.
Lifespan Development 6th Edition
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Anatomically, the prostate can be subdivided in two ways: by zone or by lobe. The prostate also contains some smooth muscles that also help expel semen during ejaculation. The function of the prostate is to secrete a fluid which contributes to the volume of the semen. The prostatic fluid is expelled in the first part of ejaculate , together with most of the sperm. In comparison with the few spermatozoa expelled together with mainly seminal vesicular fluid, those in prostatic fluid have better motility , longer survival, and better protection of genetic material. Disorders of the prostate include enlargement, inflammation , infection, and cancer. The classical description of a healthy human male prostate portrays it as slightly larger than a walnut.
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