Slide Labels

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i. The plasmalemma C
ii. Glycoproteins of the glycocalyx A
iii. Actin microfilaments B

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List two differences between apocrine and eccrine sweat glands.

Answer 28

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

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Answer 32

**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.

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