The correct answer is: Creating a loosely packed area of cells that enable other cells to migrate through
There are four types of tissue in humans: epithelilal, muscular, connective and nervous. Epithelial tissue or epithelium lines the outer surfaces of organs and blood vessels but also the inner surfaces of cavities in different internal organs. Functions of epithelial cells include:
- Protection-from radiation, toxins, pathogens
- Transcellular transport-exchange of chemicals between body cavities and tissue below them
- Sensing-e.g when the cells have cilia for mechano or thermosensation.
Depending on cell shape, epithelium can be divided into categories: squamous epithelium, cuboidal epithelium, columnar epithelium. Depending on layer number, all of them can be subdivided into: simple (one layer of cells) or stratified (with more layers).
Answer:
Because atoms could not be seen, Dalton could not base his theory on direct observation, and this was a major stumbling block for many scientists. ... It was easier to express stoichiometric proportions in terms of atoms than in terms of absolute mass.
Explanation:
The correct answer is C
the photoreceptor is represented by the rods and cones, the receptor neurone is the bipolar neurone in the retina, in the brain the multipolar neuron in the retina synapses with a neuron in the geniculate nucleus that sends impulses through the third cranial nerve
Answer:
When bacteria become resistant to overused antibiotics it means that is not longer inhibited by the antibiotic at clinically achievable levels. One way how these bacteria replicate and transfer the resistance is by engulfing cellular DNA by neighboring cells.Bacteria can take up naked DNA encoding for resistance native to similar species and incorporate it into their genome
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