Summarize the processes of spermatogenesis and spermiogenesis
What will be an ideal response?
Spermatogenesis is the process of sperm cell development. It includes all phases of meiosis and spermiogenesis, the cytoplasmic changes required to form a mature sperm cell. Spermatogenesis occurs in the seminiferous tubules of the testes by spermatogenic cells. Spermatogonia divide to produce primary spermatocytes, which undergo the first meiotic division to form two secondary spermatocytes. Each secondary spermatocyte undergoes the second meiotic division to produce four total spermatids. Spermiogenesis is the maturation of spermatids into motile sperm cells.
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Bicarbonate secretion
A) is secreted by apical Cl--HCO3- antiport. B) neutralizes acid entering from the stomach into the duodenum. C) is not dependent on high levels of carbonic anhydrase to maintain bicarbonate production. D) neutralizes acid entering from the stomach into the duodenum and is secreted by apical Cl--HCO3 - antiport. E) is secreted by the acinar cells.
The “universal recipient” blood type is:
a. type A b. type B c. type AB d. type O
Are unipolar neurons in a tissue sample of the PNS more likely to have a sensory or a motor function?
A) sensory function B) motor function
Match each bone with its description or location.
a. femur b. humerus c. ulna d. fibula e. zygomatic bone f. mandible g. carpals h. metatarsals i. patella j. ribs k. phalanges l. sternum m. stapes 1. _____ Cheekbone 2. _____ Bone of the thigh 3. _____ Bones of the wrist 4. _____ Can be true, false, or floating 5. _____ One of the bones of the lower leg 6. _____ Bone of the upper arm 7. _____ Kneecap 8. _____ One of the bones of the lower arm 9. _____ Bone of the lower jaw 10. _____ Bones of the foot 11. _____ One of the bones of the middle ear 12. _____ Bones of the fingers and toes 13. _____ Breast bone to which the ribs attach