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Margarita [4]
3 years ago
7

Why is clonal selection and expansion so important to the immune response? A) It facilitates the secretion of cytokines. B) It e

nables certain cells to kill target cells. C) It is critical to the increase in the numbers of specific cells. D) It facilitates interleukin secretion which in turn directs cell differentiation.
Medicine
1 answer:
kozerog [31]3 years ago
3 0

Answer:

C) It is critical to the increase in the numbers of specific cells

Explanation:

Clonal selection and expansion is the mechanism by which the immune system selects specific cells capable of both recognizing antigens and increasing the number of these useful cells that fight against pathogenic microorganisms and viruses. During this mechanism, B cells (also known as B lymphocytes) that have specific transmembrane receptors capable of recognizing specific antigens, are multiplied. The process of expansion involves the hypermutation of the clones in order to modify the shape and structure of these receptors, which increases the affinity of the clones for specific antigens.

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After crossing midline, the axon of the upper motor neuron continues its descent in the lateral portion of the spinal cord calle
stiv31 [10]

Answer:

The correct answer will be options

1. Lateral corticospinal tract

2. lower motor neuron

3. Ventral horn.

Explanation:

The descending neuron originates from the cerebral cortex of the brain which converges and descends into internal capsule through which it descends into the brain stem of the brain.

At the crossline of the brain stem and spinal cord upper motor neurons descend into the spinal cord through which it passes into the lateral corticospinal tract and reaches the ventral horn.  At these ventral horns the upper motor neurons transfer its impulse to lower motor neurons which sends signals to effector organs.

Thus, Lateral corticospinal tract, lower motor neuron and ventral horn are the correct options.

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3 years ago
Which differentiating sign is required to make the diagnosis of pyelonephritis from that of cystitis?
Wittaler [7]

Urinalysis confirmation of white blood cell casts is the differentiating sign required to make the diagnosis of pyelonephritis from that of cystitis.

<h3>What is pyelonephritis?</h3>

An unexpected and serious kidney infection is known as acute pyelonephritis. The swelling it produces to the kidneys could result in long-term harm. Pyelonephritis poses a serious risk to life.

The illness is referred to as chronic pyelonephritis when attacks happen frequently or persistently. Although the chronic form is uncommon, it tends to affect kids or persons who have urinary blockages more frequently.

<h3>What is cystitis?</h3>

The medical word for bladder irritation is cystitis. Urinary tract infections, which are the most common bacterial infection to cause irritation. A bladder infection can be uncomfortable and unpleasant, and if it spreads to your kidneys, it could pose a major health risk.

Less frequently, cystitis can develop in response to some medications, radiation therapy, or possible irritants such feminine hygiene products, spermicidal jelly, or prolonged catheter use.

Know more about Pyelonephritis and Cystitis visit:

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5 0
2 years ago
⦁ Constance Blalock gets a bad case of the flu and ends up in the hospital for three days. Which part of her basic insurance cov
n200080 [17]

Answer:

last answer

Explanation:

Medicare part b

7 0
3 years ago
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Even if an infant has begun eating other foods, experts recommend that the mother continue to breast feed until the baby is at l
aleksklad [387]

Even if an infant has begun eating other foods, experts recommend that the mother continues to breastfeed until the baby is at least<u> </u><u>two years </u>old.

The process of changing baby habits from breastfeeding to self-nourishment is known as weaning. Breastfeeding should be recommended only for the first six months, but according to the American Academy of Pediatrics, at least one year of breastfeeding and food should be given. Breastfeeding for one year and beyond is healthy for a mother.  According to the World Health Organization ( WHO), for up to 2 years mother should breastfeed the baby along with the food.

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6 0
2 years ago
Cómo se fracciona la sangre en el Banco de Sangre
Fofino [41]

Answer:

"Once the donor has finished his donation, the extracted blood is separated into components: red blood cells, platelets and plasma. ... The separation of the blood into the different components is carried out in the fractionation room and is carried out using the centrifugation technique." I found that online.

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