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ATIVIDADE 1 – SAÚDE – EMBRIOLOGIA E HISTOLOGIA –
52/2023
O espermatozoide e o ovócito, gametas masculino e feminino, respectivamente, são células
sexuais altamente especializadas. Elas contêm metade do número de cromossomos
presentes nas células somáticas.
O número de cromossomos é reduzido durante a meiose, um tipo especial de divisão
celular que ocorre durante a gametogênese. Este processo de maturação é chamado de
espermatogênese no sexo masculino, e oogênese no sexo feminino. A história da formação
dos gametas masculino e feminino é diferente, mas a sequência de forma geral é a mesma.
Fonte: MOORE, K. L.; PERSAUD, V. Embriologia Básica . Rio de Janeiro: Elsevier, 2004.
Uma das formas de tornar um homem estéril se dá por meio da vasectomia, um
procedimento cirúrgico relativamente simples. O procedimento leva de 15 a 20 minutos e
não há necessidade de internação, utilizando apenas anestesia local.
" O empresário Lucas Cabral, de 32 anos de idade, realizou vasectomia há cinco meses,
após decisão em comum acordo com a esposa. 'Já temos dois filhos. Quando o segundo
nasceu, veio a necessidade de fazer o procedimento', conta ele, explicando que a cirurgia e
o tempo de recuperação foram bastante tranquilos.
' Não me arrependo em nada, pois foi uma atitude muito bem pensada', complementa."
Fonte: https://www.gov.br/saude/pt-br/assuntos/noticias/2022/outubro/sus-oferece-
gratuitamente-cirurgia- de-vasectomia-em-todo-o-pais. Acesso em: 25 abr. 2023.
a) JUSTIFIQUE por que esta cirurgia de esterilização que Lucas fez impede que o
espermatozoide fecunde o ovócito.
b) EXPLIQUE qual o caminho que o espermatozoide percorre até a fecundação e como
ocorre o processo de maturação

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Gametas e Vasectomia

  • 1. ATIVIDADE 1 – SAÚDE – EMBRIOLOGIA E HISTOLOGIA – 52/2023 O espermatozoide e o ovócito, gametas masculino e feminino, respectivamente, são células sexuais altamente especializadas. Elas contêm metade do número de cromossomos presentes nas células somáticas. O número de cromossomos é reduzido durante a meiose, um tipo especial de divisão celular que ocorre durante a gametogênese. Este processo de maturação é chamado de espermatogênese no sexo masculino, e oogênese no sexo feminino. A história da formação dos gametas masculino e feminino é diferente, mas a sequência de forma geral é a mesma. Fonte: MOORE, K. L.; PERSAUD, V. Embriologia Básica . Rio de Janeiro: Elsevier, 2004. Uma das formas de tornar um homem estéril se dá por meio da vasectomia, um procedimento cirúrgico relativamente simples. O procedimento leva de 15 a 20 minutos e não há necessidade de internação, utilizando apenas anestesia local. " O empresário Lucas Cabral, de 32 anos de idade, realizou vasectomia há cinco meses, após decisão em comum acordo com a esposa. 'Já temos dois filhos. Quando o segundo nasceu, veio a necessidade de fazer o procedimento', conta ele, explicando que a cirurgia e o tempo de recuperação foram bastante tranquilos. ' Não me arrependo em nada, pois foi uma atitude muito bem pensada', complementa." Fonte: https://www.gov.br/saude/pt-br/assuntos/noticias/2022/outubro/sus-oferece- gratuitamente-cirurgia- de-vasectomia-em-todo-o-pais. Acesso em: 25 abr. 2023. a) JUSTIFIQUE por que esta cirurgia de esterilização que Lucas fez impede que o espermatozoide fecunde o ovócito. b) EXPLIQUE qual o caminho que o espermatozoide percorre até a fecundação e como ocorre o processo de maturação