i. The plasmalemma C
ii. Glycoproteins of the glycocalyx A
iii. Actin microfilaments B
List two differences between apocrine and eccrine sweat glands.
Apocrine glands have large lumens and their ducts supply protein-rich secretions to hair follicles.
Apocrine glands are mainly found in axillary and perineal regions. Bacterial action breaks down proteins in apocrine secretions and release odour, perhaps a vestige of pheromone release in other mammals.
Eccrine glands: wider distribution (most numerous on soles), have smaller lumens and release watery secretions to the skin surface for thermoregulation
Contrast the morphology of the cells of the cord and sinus Lymphocytes of the cord have dense, circular nuclei and little cytoplasm.
Macrophages of the sinus have larger, lighter nuclei, with more, irregular cytoplasm. Note that macrophages are generally different to recognise without the use of special staining techniques.
How can you tell that this node was not isolated from an individual suffering from an infection?
Swollen lymph nodes result from an influx of neutrophils, of which very few can be seen in the sinusoids.