![](https://nthumb.tpgimages.com/mid2_com_img/1339/7978/TOP10175236.jpg)
False-colour scanning electron micrograph (SEM) of two pollen grains of cocksfoot grass, Dactylis glomerata, a major cause of hay fever (allergic rhinitis). The pit on the right-hand grain is the germination pore, out which the pollen tube grows. Cocksfoot pollen is a wind-dispersed summer pollen. Hay fever sufferers produce a sensitising antibody, immunoglobin E (IgE), which attaches to cells in the nose & eyes. It reacts with inhaled pollen, causing the release of various chemicals including histamine. Histamine causes the mucous membranes of the nose, eyes, & throat to swell & become inflamed, bringing on the symptoms of hay fever. Magnification: x570 at 6x4.5cm size. JBU colouring: blue & orange. BW original is B786/073.
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Details
Creative#:
TOP10175236
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
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N/A
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No
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