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2 years ago

Select the three factors from the choices below that determine the size of the actual focal spot on the target anode.

1 answer:

8 0

Answer: A focal spot in the x-ray setup is the area of the anode surface which receives the beam of electrons from the cathode. It is the apparent source of x-rays.

Below are some of the factors that affect its size.

Explanation:

Size of the focal spot depends on

* angle of the anode

Other prime factors that affect x-ray emission; under the control of the radiographer includes;

• Miliamperage-second (mAs)(tube current measurement)

• Kilovoltage (kVp) Controls both the quantity and quality of the x-ray beam with the speed and energy.

• Distance (d) - Related to tube design and construction.

• Tube housing

• Target material

• Filtration

• Voltage waveform

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Explain one specific reason why a cell wants to have tight control over its Cl- channel.

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<span>Among other parts, Cl-channels or Chloride channels hold a great importance in maintaining the proper volume of the cell. It is significant also especially cell proliferation and salt secretion.</span>

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2 years ago

A scientist has discovered a new organism and wishes to classify it based on morphology and genetics. While he is waiting on the

Ipatiy [6.2K]

Answer:

tentatively group it with birds and speculate that the trait shared only with bats is a derived rather than an ancestral trait with bats.

Explanation:

The scientist after his observation should tentatively classify this organism with birds and the the second end of calculating the other morphological traits which makes it possess the likely bat traits to be ancestral.

According to scientists, most widely used modern systematic practice

depends upon the assumption that a change from character in one species

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In this scheme, there are no independently derived parallel evolutionary changes,

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Also using the parsimony principle, a scheme of common ancestry for all the species is derived that uses all the characters that have been observed.

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2 years ago

Read 2 more answers

You are a dog breeder and are interested in two traits that you believe are inherited by simple genetic loci glossy (G) coat is

Paul [167]

Answer:

GL, Gl, gL, and gl

Explanation:

The mom is glossy long haired. Since glossy (G) is dominant over to dull (g) and long hair (L) is dominant to short hair (l), the possible genotypes of the mom would be:

GGLL, GgLL, GGLl, or GgLl

The dad is dull and short haired, the genotype would be ggll.

GGLL x ggll

Progeny = all GgLl (all glossy long haired)

GgLL x ggll

Progeny = 8 GgLl, 8 ggLi (glossy long haired and dull long haired)

GGLl x ggll

Progeny = 8 GgLl, 8 Ggll (glossy long haired and glossy short haired)

GgLl x ggll

Progeny = 4 GgLl, 4 Ggll, 4 ggLl, 4 ggll (glossy long, glossy short, dull long, and dull short)

<em>Only a cross of ggll with GgLl produced the offspring that cover the phenotypic range shown in the illustration. Hence, the genotype of the mom is GgLl.</em>

The parental gametes produced by the mom would be; GL, Gl, gL, and gl

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1 year ago

Identify the cell stage of erythropoiesis indicated by "e."

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Is there a picture that shows what 'e' is? Possible description?

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Classifying the characteristics of dna, mrna, and trna determine from the description if each characteristic applies to dna, mrn

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The DNA, mRNA and tRNA are the essential nucleic acids that initiate protein synthesis. The DNA contains the genetic code of our human body in the form of chromosomes. It is composed of nucleic acids like uracil (U), guanine (G), adenine (A) and cytosine (C). The messenger RNA or mRNA carries this code called codons expressed in three-letter codes. Each amino acid has its own assignment of code. The mRNA carries this code to the ribosome which is the site for protein synthesis. The translational RNA or tRNA contains anti-codons to translate the codes in the mRNA into amino acids that link together to form proteins.

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