Answer:
The best use of fluroescein stain in an eye examination is to check for corneal injuries.
Explanation:
The fluorescein stain test is an eyeexamination performed by the ophthalmologist to detect corneal lesions, but it is also useful for finding foreign bodies in the eye.
This test consists of placing an orange dye on the eye surface, then applying a blue light to detect corneal lesions, which turn blue-green when present.
Based on the distribution given by the histogram, the distribution of triglyceride for both men and women are skewed to right and the Women distribution seems to have a better triglyceride level.
The triglyceride level in Women is better as only about 13 observations above 150 mg/dL. This observations also fall below 500 mg/dL.
The Men's distribution are more spread out, with about 25observations having above 150mg/dL and 1 observation having about 750mg/dL triglyceride level.
Therefore, Women's distribution has a better triglyceride level.
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myocardium is NOT true?
a. It's the layer of the heart
wall that actually contracts
b. Composed of cardiac
muscle
C. Arranged in thick twisted
bundles
d. Secretes pericardial fluid
Answer:
C or D
Explanation:
b. False
Answer:
The answer to the question: The membrane potential seeks the equilibrium potential of the ion whose permeability is dominant, would be, True.
Explanation:
When a cell needs to prepare to activate itself, or start what is known as an action potential, there needs to be a change in the polarity that is constant over the cell membrance. Usually, this polarity tends to be primarily negative on the inside thanks to the anions, and positive on the extracellular side, thanks to the concentration, particularly of sodium ions. In general, and without stimulus, this resting membrane will not activate or generate anything. However, when the cell activates, several channels, both leakage and gated, will activate to allow the two most important ions, sodium and potassium, to leak in and out of the cell to generate an electrical gradient. In order to restore this, and return to resting, the cell´s membrane must restore its potential, and thus, it will activate the channels of the dominant ion, to restore the balance. In fact, normally, there are leakage potassium channels in the cell membrane that allow potassium to leak out of the cell, helping to maintain the negativity of the cytoplasm, and the stability.
B. Most types of cancer start in the hair follicles
C. Chemotherapy treatments block the synthesis of keratin, the primary protein
component of hair
D. Chemotherapy treatments disrupt meiosis
E. Chemotherapy treatments stop cell division, and therefore have the most pronounced side effects on tissues that normally have the highest rates of cell division, such as hair
Answer:
Answer is E.
Explanation:
During chemotherapy, the medications are so strong and powerful that it target and stop all cells that undergo fast rate of division. Hair tissues are one of the fast dividing cells in the body so chemothrapic drugs stop its division resulting in hair fall.
Since, the options are not given the question is incomplete. The complete question is as follows:
Unbeknownst to her or her care team, a 51-year-old woman's breast cancer has an etiology rooted in the fact that tumor suppressor genes are present but have been silenced. Consequently, she has not synthesized normal cancer-suppressing proteins and neoplasia has resulted. What process has accounted for the woman's cancer?
A. Chromosomal translocation
B. The “two-hit” hypothesis of carcinogenesis
C. Epigenetic mechanisms
D. A DNA repair defect
Answer: C. Epigenetic mechanisms
Explanation:
In cancer epigenetics the modification of the DNA of the cancer cells occur which will not cause the change in the nucleotide sequence rather it will affect the way, through which the genetic code is being expressed in the body. In cancer different type of epigenetic mechanisms can result which may cause silencing of the tumor suppressor genes, modification of the histone, dysregulation of proteins of DNA, alteration of the methylation pattern of DNA.
According to the given situation, is an example of the epigenetic mechanism of cancer. This is because the tumor suppressor genes of cancer cells are present but these are silenced, that is they are non-functional as a result of this the cancer-suppressing proteins will not be synthesized in the body. This entire condition will be contributing to the neoplasia.