False colour scanning electron micrograph (SEM) of a pollen grain of Timothy grass, Phelum pratense, also known as cat's-tail. A summer (June-August) grass pollen dispersed by the wind, it is a major cause of hay fever (Allergic rhinitis & pollenosis). 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 familiar symptoms of hay fever. Magnification: X600 at 35mm size. Original is bw print b786/139.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP03201740
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
Same folder images: