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Oksana_A [137]
2 years ago
12

Apa template about multiple sclerosis

Biology
1 answer:
garik1379 [7]2 years ago
7 0

Answer:

Multiple Sclerosis is an inflammatory disease in which myelin sheath of nerve cells of brain and spinal cord are damaged.

Explanation:

Cause:- (Exact cause of inflammation is not known)

  • But damage is caused due to attack by autoimmune cells or antibodies against myelin sheath.

Types of tissues attack:-

  • Oligodendrocytes and myelin sheath is damaged and stripped away from axon and the process is known as demyelination.
  • Myelin sheaths are made up of fatty tissues and help in transmission of electric impulse.

Result of immune system attack:-

  • Damaged myelin sheath stop forming whIte matter of central nervous system.
  • Hence disrupt coordinating communication between different brain regions.

Signs and symptoms:- vary from person to person

  • Diminished eyesight.
  • Disrupt motor coordination.
  • Weak sensory perception.
  • Fatigue and dizziness.
  • Speech disorder.
  • Muscle weakness and spasticity.
  • Difficulty in urination and stool.

Diagnosis and treatment:-

  • Diagnosis include MRI T2 findings and cerebrospinal fluid specific oligoclonal bands.

#SPJ2

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All of the following except __________ developed in some vascular plants and are not present in any nonvascular plants.All of th
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Answer:

Vascular plants have separate tubular tissues such as xylem, phloem for smooth transport of water, minerals and food while non-vascular plants do not show these attributes.

Explanation:

Although both life cycles are divided between the sporophytic and gametophytic generations, vascular plants have a dominant diploid sporophytic phase while non-vascular plants have a dominant haploid gametophytic phase.

Non-vascular plants are poikilohydric (they can withstand dehydration and can recover without any damage to their tissues), though they cannot control the water level in their cells and tissues. On the other hand, vascular plants are homoiohydry. They can survive in any habitat and can control the water content in cells and tissues, though they have low capacity to survive dessication compared to the non-vascular plants.

Non-vascular plants do not have true leaf. The leaves are mere chlorophyll containing. Photosynthesized food are directly sent from one cell to the other. They lack proper transport mechanism for food and water.

On the other hand, the vascular plants have complex multilayered leaf (cells) structure. The waxy layer cuticles on the leaves prevent dessication. That are more chlorophyll containing than their counterpart.

3 0
3 years ago
Cell having two copies of each type of chromosome is called
Sonbull [250]

Answer: Diploid means you have two of each type of chromosome.

Explanation:

Diploid is the term that refers to the number of each type of chromosome that an organism has. And diploid specifically means every cell in that organism has two copies of each type of chromosome.

4 0
2 years ago
In fruit flies, long wings (W) are dominant over short wings (w), and brown pigments (N) are dominant over yellow pigments (n).
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Answer:

WwNn

Explanation:

  • Long wings (W) are dominant over short wings (w)
  • Brown pigments (N) are dominant over yellow pigments (n)

A fly that is homozygous dominant for both traits (WWNN) is crossed with a fly that is homozygous recessive for both traits (wwnn).

All gametes produced by the WWNN individual will be <em>WN,</em> and all gametes produced by the homozygous recessive individual will be <em>wn</em>.

When the gametes from the two parents combine, the zygote will be heterozygous for both genes, with the genotype WwNn.

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Catfishing is posting inflammatory remarks online to generate negative responses.(1 point)True False
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Answer: That is false

Explanation: Catfishing is a deceptive activity where a person creates a  fake identity on a social network account.

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The answer is

C. electrons

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