Questões de Vestibular Para puc - pr
Foram encontradas 294 questões
Resolva questões gratuitamente!
Junte-se a mais de 4 milhões de concurseiros!
A duração de um ciclo menstrual é, em média, de 28 dias. Convencionou-se designar o primeiro dia da menstruação
como o primeiro dia do ciclo. A regulação do ciclo depende de hormônios gonadotróficos ( FSH e LH) e de hormônios
esteroides (estrógeno e progesterona). É possível identificar nos gráficos a seguir dois ciclos femininos integrados: o
ovariano e o uterino.
Leia o texto a seguir.
Brasileiros descobrem mudança genética ligada ao câncer
Diagnóstico precoce da mutação permite prevenção e tratamento mais efetivos
Uma mutação genética que favorece o aparecimento do câncer de mama foi descoberta por pesquisadores do Instituto Fernandes Figueira (IFF/Fiocruz). Dois genes estão comprovadamente relacionados ao câncer de mama: o brca1, no cromossomo 13, e o brca2, no cromossomo 17 (eles foram batizados em função do nome em inglês da doença -- breast cancer ). Ambos são supressores de multiplicação celular, ou seja, contêm informações para sintetizar proteínas que bloqueiam a reprodução das células.
As células humanas contêm duas cópias de cada gene, chamadas de alelos. Para que o câncer de mama apareça, as duas cópias do gene brca1 ou do brca2 devem apresentar mutação. Mesmo que uma mulher nasça com apenas um dos alelos alterado, ela corre o risco de desenvolver a doença, pois a outra cópia pode sofrer mutação pela ação de fatores ambientais, como consumo de álcool, nicotina ou outras substâncias cancerígenas.
Fonte: http://cienciahoje.uol.com.br/noticias/medicina-e-saude/brasileiros-descobrem-mudanca-genetica-ligada-ao/?searchterm=genetica Acesso: 02 de maio de 2016.
Read the comic strip and answer question:
Based on the comic strip, select the alternatives that are TRUE:
I. In the sentence “I heard you´re gonna be an artist...” “gonna” is the same as “going to”.
II. In the sentence “I heard you´re gonna be an artist...” “gonna” is the same as “want to”.
III. In the sentence “I wanna be an artist” “wanna” is the same as “going to”.
IV. In the sentence “I wanna be an artist” “wanna”
is the same as “want to”.
Will we ever grow replacement hands?
"Over the past few weeks on the BBC News websitewe have looked at the potential for bionic body partsand artificial organs to repair the human body. Now wetake a look at "growing-your-own".There is a pressing need. A shortage of availableorgans means many die on waiting lists and those thatget an organ must spend a lifetime onimmunosuppressant drugs to avoid rejection.
The idea is that using a patient's own stem cells togrow new body parts avoids the whole issue ofrejection as well as waiting for a donor.
Dr Anthony Atala, director of the Institute forRegenerative Medicine at the Wake Forest BaptistMedical Center in North Carolina, US, has madebreakthroughs in building bladders and urethras.
He breaks tissue-building into four levels ofcomplexity.
• Flat structures, such as the skin, are the simplest to engineer as they are generally made up of just the one type of cell.
• Tubes, such as blood vessels and urethras, which have two types of cells and act as a conduit. • Hollow non-tubular organs like the bladder and the stomach, which have more complex structures and functions.
• Solid organs, such as the kidney, heart and liver, are the most complex to engineer. They are exponentially more complex, have many different cell types, and more challenges in the blood supply.
"We've been able to implant the first three in humans. We don't have any examples yet of solid organs in humans because its much more complex," Dr Atala told the BBC.
Adapted from: http://www.bbc.co.uk/news/health-16679010 June 2012.
Will we ever grow replacement hands?
"Over the past few weeks on the BBC News websitewe have looked at the potential for bionic body partsand artificial organs to repair the human body. Now wetake a look at "growing-your-own".There is a pressing need. A shortage of availableorgans means many die on waiting lists and those thatget an organ must spend a lifetime onimmunosuppressant drugs to avoid rejection.
The idea is that using a patient's own stem cells togrow new body parts avoids the whole issue ofrejection as well as waiting for a donor.
Dr Anthony Atala, director of the Institute forRegenerative Medicine at the Wake Forest BaptistMedical Center in North Carolina, US, has madebreakthroughs in building bladders and urethras.
He breaks tissue-building into four levels ofcomplexity.
• Flat structures, such as the skin, are the simplest to engineer as they are generally made up of just the one type of cell.
• Tubes, such as blood vessels and urethras, which have two types of cells and act as a conduit. • Hollow non-tubular organs like the bladder and the stomach, which have more complex structures and functions.
• Solid organs, such as the kidney, heart and liver, are the most complex to engineer. They are exponentially more complex, have many different cell types, and more challenges in the blood supply.
"We've been able to implant the first three in humans. We don't have any examples yet of solid organs in humans because its much more complex," Dr Atala told the BBC.
Adapted from: http://www.bbc.co.uk/news/health-16679010 June 2012.
Analyze the following setence from the text:
“Solid organs, such as the kidney, heart and liver, are the most complex to engineer. They are exponentially more complex, have many different cell types, and more challenges in the blood supply.”
The expressions in bold print “the most complex” and “more complex” are examples of superlative and comparative structures. Select the alternatives that provide other examples of superlative and comparative sentences:
I. It has been selected as the best hospital in the state.
II. The treatment was highly expensive and extra medication was necessary.
III. The treatment is more effective on younger patients.
IV. Most of the time the effects of the medication are
hard to notice.
Conheça nossos planos