Answer the following questions true (T) or false (F)
1. The embryonic period of prenatal development occurs from week 3 until week 8.
2. Sperm entry into the secondary oocyte triggers the acrosomal reaction.
3. The four extraembryonic membranes that arise from the bilaminar embryonic disc are the endoderm, mesoderm, ectoderm, and placenta.
1. TRUE
2. FALSE
3. FALSE
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A patient is admitted to the hospital with suspected meningitis. Their doctor uses a ________ to test for presence of bacteria or increased quantities of immune cells in the CSF.
What will be an ideal response?
The joint formed by the axis and atlas that permits the "no" shaking of the head is a ________ joint.
A. plane B. pivot C. hinge D. condylar E. saddle
Bone cells form concentric circles around longitudinal tubes called
A) osteons. B) lacunae. C) central canals. D) canaliculi.
The minimum energy required to start a chemical reaction
A. moves in energy surges. B. can be lowered by enzymes. C. results from random molecular movement. D. comes from ionic energy motion. E. is elevated by a catalyst.