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).
In the gastrointestinal system, ondansetron (Zofran), a medication, blocks serotonin receptors.
<h3>Does tea contain any drugs?</h3>
Caffeine is a stimulant substance that some people perceive to be addictive and is present in some varieties of tea. Although it has been suggested that regular tea consumption may be associated with signs of dependency in certain individuals, experts disagree on whether or not tea addiction actually qualifies as an addiction.
<h3>What does nicotine do?</h3>
The messages that are sent between the brain and body are sent more quickly thanks to the stimulant substance nicotine. Due to the fact that nicotine is the primary psychoactive component in tobacco products, the focus of this Drug Facts page will be on the consequences of nicotine use.
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Answer:
Damaged DNA causes an increase in the number of mutations in the cell: this is extremely dangerous for the body and in fact this process is at the basis of the birth of cancer cells.
To avoid this, the cell is equipped with some molecular protective systems including the activation of the p53 protein. p53 induces recruitment of DNA damage repair systems and stops cell replication until the damage has been repaired. If the damage cannot be repaired p53 induces cell death through apoptosis
Answer:
it would change to 144 percent
Answer:
a. white
b. Bb
Explanation:
<em>A test cross usually involve crossing an individual whose zygosity is unknown with a homozygous recessive version of individual of the same species.</em>
Brown coat (B) is dominant over white coat (b). Hence, there is no way to physically distinguish between a BB rabbit and a Bb rabbit because both of them will be brown. A bb rabbit however will be white in appearance.
A test cross would therefore involve crossing the brown male rabbit with bb (white) rabbit.
Assuming that the genotype of the brown rabbit is BB, all the progeny will be brown as shown by the cross below.
BB x bb
Bb Bb Bb Bb
In order word, assuming the genotype is Bb, some of the offspring will appear brown while some will appear white.
Bb x bb
Bb Bb bb bb
<em>Hence, the only way the test cross would produce white offspring is if the genotype of the brown rabbit is heterozygous, Bb.</em>