Name the following (3)
1. Bone cells, called asteoblasts, are located in special spaces.
2. The epidermis of the system and leave secrets a waxy coating called.
3. The antibiotic which trigger allergic reactions in some people.
Answers
1} Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
2} Epidermis iis one cell thick and is covered with cuticle. Cuticle is a water proof layer of a waxy substance called cutin which is secreted by epidermal cells.
3} Penicillin is the most common drug allergy. If you experience an allergic reaction after taking penicillin, you won't necessarily have a similar reaction to related drugs such as amoxicillin. But it is more likely to happen. Anticonvulsant, aspirin, ibuprofen and chemotherapy drug allergies are also common.