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Stack #97512
A&P II Male reproductive system
Question | Answer |
---|---|
a 23 chromosome female gamete | ovum |
a 23 chromosome male gamete | spermatozoon |
46 chromozomes capable of developing into a new individual | zygote |
an ovoid structure that is about five centimeters long and three centimeters in diameter and is enclosed by a tough white fibrous capsule. | testis |
subdivides the testis into about 250 lobules | septa |
Each lobule contains a ___________ _________ that courses posteriorly and unites to form a complex network of channels. | seminiferous tubule |
These channels give rise to ducts that join the | epididymis |
The seminiferous tubules are lined with __________ cells that produce sperm. | spermatogenic cells |
_________ cells are located within the spaces between the seminiferous tubules and produce and secrete male sex hormones. | Interstitial cells |
A tad-pole shaped structure with a flattened head, cylindrical body, and an elongated tail. | Sperm cell |
The head is composed of a nucleus containing highly compacted | chromatin. |
The __________ contains enzymes that aid in penetrating the egg cell. | acrosome |
The midpiece contains a central core and many ________ arranged in a spiral. | mitochondria |
The tail of a sperm cell consists of several _________ enclosed in a cell membrane extension. | microtubules |
During the embryonic stage ___________become active in response to hormones. | spermatogonia |
Some spermatogonia undergo mitosis while others enlarge into primary | spermatocytes. |
At puberty, ________ causes the primary spermatocytes to undergo meiosis and yield secondary spermatocytes. | testosterone |
Each secondary spermatocyte divides into two | spermatids. |
Spermatids mature into | sperm cells. |