精子发生的

Prior to fertilization sperm has to undergo an activation process known as capaciation, leading to the acrosome reaction.

在受精之前精子必须完成一个被称为"获能"的活化过程，最终发生顶体反应。

The first contact of the sperm head with the egg's jelly coat triggers the acrosome reaction, in which enzymes

当精子和卵子的胶状膜发生接触时，触发了顶体反应。

In aspermous Patients the reason is the obstruction of spermatogenesis, the most common obstruction occurs in the spermatid level.

在无精症患者中是由生精阻滞所致，最常见的阻滞发生在精子细胞水平。

These maturation changes still occur even when spermatozoa are confined to caput epididymidis by ligatures.

用结扎的方法将精子限制在附睾头内，这些成熟变化仍可能发生。

The testis which was ignored by previous authors consists of nine finger-shaped lobes on each.

在一次发育期中精子的发生大约持续两个月，产生的精子量大；雄虾具有多次交配的能力。

ABSTRACT We divided spermatogenesis into two parts:The first part is the differentiation of spermatid and the second part is spermiogenesis.This is the second.

摘 要 华支睾吸虫精子的分化可以发现分为两部分，一是精细胞疼痛的发生，二是精子的形成，本文护士报道的为第二部分。

The spermatogenesis in worker included spermatogonia, primary speramtocyte, second spermatocyte and spermatid, but mature sperm was not found.

工蚁精子的发生过程包括精原细胞时期和精母细胞时期，并形成了精细胞，但未形成精子。

The spermatogenesis includes five stages: spermatogonium、primary spermatocyte、secondary spermatocyte、spermatid and spermatozoon.

雄体的生殖细胞发生经历精原细胞、初级精母细胞、次级精母细胞、精子细胞和成熟精子五个时期。

The spermatogenesis includes five stages: spermatogonium、primary spermatocyte、secondary spermaticyte、spermatid and spermatozoon.

雄体的生殖细胞发生经历精原细胞、初级精母细胞、次级精母细胞、精子细胞和成熟精子五个时期。

Despite of its important role during embryogenesis and reproductive development,more and more studies implied a critical role for Rhox5 on the determination and differentiation during myogenesis.

除在生殖系统的发育、精子的形成和成熟过程中发挥重要的作用外，多项研究表明其在肌细胞的发生和分化中担任重要角色，有可能作为MyoD基因的上游调控子或者和其他转录因子协同作用，调控肌细胞的早期发生和分化事件。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。