ANAT UNIT 1 FINAL Word Scramble
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Question | Answer |
What is the only cell in the male gamete production cycle that divides by mitosis? | SPERMATOGONIA |
Is a spermatogonia haploid or diploid? | DIPLOID (46 CHROMOSOMES) |
In the gamete production cycle a spermatagonium will divide via mitosis to become what two types of daughter cells? | 1 SPERMATOGONIA AND 1 PRIMARY SPERMATOCYTE |
Is a primary spermatocyte haploid or diploid? | DIPLOID (46 CHROMOSOMES) |
A primary spermatocyte will divide by meiosis and give rise to two daughter cells called: | SECONDARY SPERMATOCYTES |
Are secondary spermatocytes haploid or diploid? | HAPLOID (23 CHROMOSOMES) |
Two secondary spermatocytes divide via meiosis and give rise to four: | SPERMATIDS |
Are spermatids haploid or diploid? | HAPLOID (23 CHROMOSOMES) |
A spermatid develops into a mature spermatozoa through the process of: | SPERMIOGENESIS |
A baby boy is born with what type of gamete? | SPERMATOGONIA |
Oogonia divide by ____ in the fetal ovary. | MITOSIS |
Oogonia divide by mitosis and give rise to these cells: | PRIMARY OOCTYES |
A baby girl is born with what type of gamete? | PRIMARY OOCTYES |
Primary oocytes are arrested in what phase of development? | (DIPLOTENE STAGE OF) PROPHASE I OF MEIOSIS |
When does a secondary oocyte form? | UPON MATURATION INTO AN OVUM WITHIN THE OVARIAN FOLLICLE, 10 HOURS PRIOR TO OVULATION. |
The second meiotic division of the secondary oocyte occurs during what process? | FERTILIZATION |
Upon fertilization, two ___ are formed, each with its own nuclear envelope. | PRONUCLEI |
Fusion of the two pronuclei in the fertilized ovum give rise to the: | ZYGOTE |
Is the zygote haploid or diploid? | DIPLOID (46 CHROMOSOMES) |
What is the 16-cell stage of embryogenesis? | MORULA |
What is the 32-cell stage of embryogenesis? | BLASTULA |
What are the individual cells of the blastula called? | BLASTOMERES |
The blastula implants on what day after fertilization? | DAY 6 |
By day 8 a fluid-filled space develops and an inner cell mass and an outer layer of cells called the trophoblast are visible. The blastula is now called a: | BLASTOCYST |
The inner cell mass is also called an ___ and will give rise to the embryo proper. | EMBRYOBLAST |
The embryoblast differentiates into two layers to form the: | BILAMINAR EMBRYONIC DISC. |
The layer of the embryonic disc adjacent to the amniotic cavity is the: | EPIBLAST |
The layer of the embryonic disc adjacent to the exocoelomic cavity is called the: | HYPOBLAST |
The exocoelomic cavity will give rise to the: | YOLK SAC |
The process of gastrulation gives rise to the: | TRILAMINAR EMBRYO |
In the trilaminar embryo, the epiblast will give rise to the embryonic ___. | ECTODERM |
In the trilaminar embryo, the hypoblast will give rise to the embryonic ___. | YOLK SAC WALL |
The cells at the margin of the epiblast and hypoblast of the trilmaniar embryo will give rise to the extraembryonic ___. | MESODERM |
This specialized collection of hypoblastic cells develops at a localized site at the margin of the bilaminar disc. | PRECHORDAL PLATE |
The prechordal plate determines this end of the embryo. | CRANIAL END |
During the third week, this longitudinal band of tissue develops in the midline of the epiblast at the caudal end of the embryonic disc. | PRIMITIVE STREAK |
The proliferation of cells at the cranial end of the primitive streak forms the: | PRIMITIVE NODE |
What groove develops in the midline of the primitive streak? | PRIMITIVE GROOVE |
The indentation in the primitive node is the: | PRIMITIVE PIT |
The embryonic mesoderm is derived from the: | PRIMITIVE MESENCHYME |
What determines the cranial-caudal midline of the embryo? | THE NOTOCHORD |
The notochord will give rise to the ___ canal. | NOTOCHORDAL |
By the end of the third week, the ectoderm overlying the notochord begins to thicken, forming this structure: | NEURAL PLATE |
The longitudinal groove that forms in the neural plate is the: | NEURAL GROOVE |
To review, embryonic spinal cord development in the hypoblast follows these six steps: | PRECHORDAL PLATE → NOTOCHORDAL PROCESS → NOTOCHORDAL CANAL → NEURAL PLATE → NEURAL GROOVE → NEURAL TUBE |
Embryonic spinal cord development in the epiblast follows these four steps: | PRIMITIVE STREAK → PRIMITIVE GROOVE, PRIMITIVE NODE → PRIMITIVE PIT |
The neural crests are derived from the: | NEUROECTODERM CELLS |
By Day 21 the following three tissue layers are formed: | ECTODERM, MESODERM, ENDODERM |
The ectoderm forms what? | THE ENTIRE SURFACE OF THE EMBRYO |
The mesoderm forms what? | THE LINING OF THE BODY CAVITY AND SUSPENDS THE GUT TUBE |
The endoderm forms what? | THE GUT TUBE |
The body cavities are derived from the: | LATERAL PLATE MESODERM |
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