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givi [52]
2 years ago
3

A technologist decides to make a 1:20 dilution of cerebrospinal fluid (CSF) after briefly evaluating a portion of the sample mic

roscopically. After making the dilution and charging the chambers, the number of cells that are observed in each of the large squares of the hemocytometer is >100. What should the technologist do to obtain the most accurate count
Biology
1 answer:
wolverine [178]2 years ago
8 0

Answer:

The technologist needs to obtain a larger dilution.

Explanation:

A hemocytometer is a tool used in the laboratory for counting cells in suspension, it consists of a microscope slide that has a rectangular indentation that forms a chamber where the cells are stably maintained and counted.

The cerebrospinal fluid (CSF) is a liquid that is localized around the brain and spinal cord. Moreover, CSF analysis is a set of laboratory tests to measure the number of red and white blood cells.  

The CSF tests are useful to detect different health problems that affect the central nervous system including, among others, infections in the brain (encephalitis, meningitis), inflammations, tumors, multiple sclerosis, etc.

In a CSF test, the number of white blood cells should be very low, and relatively high concentrations of such cells may be indicative of multiple sclerosis, encephalitis, leukemia, hemorrhage and allergy.

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What combinations of alleles could result from a crossover between BD and bd chromosomes?
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Answer:

Bb, Db , Bd and Dd

Explanation:

When a cross between two parents (having certain trait) is carried out , they share their alleles with each other to produce offspring with new traits. These offspring have gentically different allele combination as compared to their parents. A  genetic cross can be represented by a punnet square (as given below)

The cross between two parents with genotype "BD" and "bd" will result into the following offspring -

B D

b Bb Db

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2 years ago
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vladimir2022 [97]

Answer:

Opposition

Explanation:

Opposition is the type of movement that is only for the hands. Opposition is them movement where you bring your finger/s in contact with your thumb. When you put it back to its anatomical position, which is beside the index finger (pointing finger) this is called <em>reposition.</em>

Retraction occurs in the scapula (Shoulder blades) and mandible (jaw). Dorsiflexion you see that happen in your foot. When you bring your toes closer to the shin. Supination is more on the forearm and foot, where you rotate it so your palms are facing forward (sole facing the other ankle for feet). Flexion is the movement of body parts where you bring them closer to each other at a joint (the angle between the two parts are lessened). Like when you bend your elbows to "flex" muscles.

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2 years ago
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levacccp [35]

Answer:

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ddd [48]

Answer:

Option D, The work done by each force is negative

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