Mecanismos de morte celular
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Science
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University
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Naiara Stefanello
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Qual das seguintes é uma alteração citoplasmática típica observada em células necróticas?
Basofilia citoplasmática
Aumento da eosinofilia citoplasmática
Encolhimento citoplasmático com aumento da granularidade
Vacuolização citoplasmática sem alteração de cor
Answer explanation
In necrotic cells, increased cytoplasmic eosinophilia is typical due to the accumulation of denatured proteins and loss of RNA, leading to a more acidic cytoplasm that stains more intensely with eosin dyes.
2.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Qual é a principal causa do aumento da eosinofilia citoplasmática em células necróticas?
Acúmulo de fragmentos de DNA
Perda de RNA e desnaturação de proteínas citoplasmáticas
Aumento da atividade mitocondrial
Aumento da síntese proteica
Answer explanation
In necrotic cells, loss of RNA and denaturation of cytoplasmic proteins lead to increased eosinophilia. This results from the breakdown of cellular components, causing a shift in staining properties.
3.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Qual alteração nuclear é caracterizada por retração nuclear e aumento da basofilia?
Cariólise
Cariorrexe
Picnose
Hipercrômia
Answer explanation
Pyknosis is characterized by nuclear retraction and increased basophilia, indicating chromatin condensation. This process leads to a shrunken, dense nucleus, distinguishing it from karyolysis and karyorrhexis.
4.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Pyknosis é melhor descrito como:
Dissolução completa do núcleo
Fragmentação do núcleo em pequenos pedaços
Condensação e retração do núcleo
Inchaço do núcleo
Answer explanation
Pyknosis refers to the condensation and retraction of the nucleus, characterized by chromatin clumping and nuclear shrinkage, distinguishing it from other nuclear changes like dissolution or fragmentation.
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Qual alteração nuclear envolve a fragmentação do núcleo picnótico?
Cariólise
Cariorrexe
Picnose
Hiperplasia
Answer explanation
Karyorrhexis is the nuclear change characterized by the fragmentation of the pycnotic nucleus, leading to the release of nuclear material. In contrast, karyolysis involves dissolution, and pyknosis refers to nuclear shrinkage.
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Cariórrexe refere-se a:
Dissolução da cromatina nuclear
Condensação do material nuclear
Fragmentação do núcleo
Aumento do nucléolo
Answer explanation
Karyorrhexis is characterized by the fragmentation of the nucleus, which occurs during cell death. This process involves the breaking apart of the nuclear material, distinguishing it from other nuclear changes.
7.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Qual alteração nuclear é caracterizada pelo desvanecimento e eventual desaparecimento da basofilia nuclear devido à degradação do DNA?
Picnose
Cariorrexe
Cariólise
Hipercromasia
Answer explanation
Karyolysis is the nuclear change marked by the fading and eventual disappearance of nuclear basophilia due to DNA degradation, distinguishing it from pyknosis and karyorrhexis, which involve different nuclear alterations.
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