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  2. Vitamin A - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A

    Within the eye, 11-cis-retinal is bound to the protein opsin to form rhodopsin in rod cells and iodopsin in cone cells. As light enters the eye, the 11-cis-retinal is isomerized to the all-trans form. The all-trans-retinal dissociates from the opsin in a series of steps called photo-bleaching. This isomerization induces a nervous signal along ...

  3. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    The first published English grammar was a Pamphlet for Grammar of 1586, written by William Bullokar with the stated goal of demonstrating that English was just as rule-based as Latin. Bullokar's grammar was faithfully modeled on William Lily's Latin grammar, Rudimenta Grammatices (1534), used in English schools at that time, having been ...

  4. Sentence diagram - Wikipedia

    en.wikipedia.org/wiki/Sentence_diagram

    A practical grammar: In which words, phrases & sentences are classified according to their offices and their various relationships to each another. Cincinnati: H. W. Barnes & Company. Reed, A. and B. Kellogg (1877). Higher Lessons in English. Reed, A. and B. Kellogg (1896). Graded Lessons in English: An Elementary English Grammar. ISBN 1-4142 ...

  5. Speech and language impairment - Wikipedia

    en.wikipedia.org/wiki/Speech_and_language_impairment

    While some speech problems, such as certain voice problems, require medical interventions, many speech problems can be alleviated through effective behavioral interventions and practice. In these cases, instruction in speech techniques or speaking strategies, coupled with regular practice, can help the individual to overcome his/her speaking ...

  6. Nutrition and cognition - Wikipedia

    en.wikipedia.org/wiki/Nutrition_and_cognition

    B vitamins, also known as the B-complex, are an interrelated group of nutrients which often co-occur in food. The complex consists of: thiamine (B 1), riboflavin (B 2), niacin (B 3), pantothenic acid (B 5), pyridoxin (B 6), folic acid (B 9), cobalamin (B 12), and biotin. [18] B vitamins are not synthesized in the body, and thus need to be ...

  7. Healthy diet - Wikipedia

    en.wikipedia.org/wiki/Healthy_diet

    Finally, limiting consumption of sugary drinks, limiting energy-rich foods, including "fast foods" and red meat, and avoiding processed meats improves health and longevity. Overall, researchers and medical policymakers conclude that this healthy diet can reduce the risk of chronic disease and cancer.

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  9. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]