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Outline the process of phagocytosis by macrophages.

Initially, the bacteria/pathogen will bind to a receptor located on the surface membrane of the macrophage. Pseudopodia will form around the bacteria, resulting in the macrophage surrounding the bacteria/pat...
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Outline the structures involved in the mammalian gaseous exchange system. For each structure explain how it increases the efficiency of gaseous exchange [6 marks]

Trachea- c shaped cartilage provides structure and support, goblet cells and ciliated epithelium, secrete mucus to trap dust and pathogens and waft the mucus up the trachea Bronchi - smooth muscle relaxes to...
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How exactly do you explain mitosis?

preceded by interphase - DNA is being replicated and the two identical copies remain joined at centromere.-prophase - visible chromosomes and centrioles move to opposite poles spindle fibres develop, nuclear...
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Answered by Ryanne F. • Biology tutor
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Explain the process of inspiration and the various muscles involved.

During inspiration the diaphragm contracts and flattens and the external intercostal muscles contract. This moves the rib cage up and out and increases the volume of the thorax. This reduces the pressure ins...
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Answered by Ravi B. • Biology tutor
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Starting with mRNa in the cytoplasm, describe how translation leads to the production of a polypeptide ( without including transcription or slicing)

Once the mRNA is in the cytoplasm the smaller ribosomal subunit will connect to it. It will then slide in the 5' to 3' until it reaches the initialization codon ( AUG), once this happens the TRNA that carrie...
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