Which structure helps regulate the temperature of the testes?
a) Dartos muscle
b) Tunica vaginalis
c) Tunica albuginea
d) Seminiferous tubules
e) Both Dartos muscle and Seminiferous tubules
a
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Microtubules
A. are a component of mitochondria. B. are the smallest components of the cytoskeleton. C. provide structure and support to the cytoplasm. D. contain the protein myosin. E. are solid, supporting rods of protein.
Identify the mismatched pair
A) receptor proteins—bind to extracellular ligands B) channel proteins—provide passageway for ions C) recognition glycoproteins and glycolipids—identify the cell as "self" D) carrier proteins—allow a cell to move E) enzymes—speed up chemical reactions
The hardest substance in the body is
A) enamel. B) cementum. C) pulp. D) bone. E) dentine.
Histology is the study of the __________.
Fill in the blank(s) with the appropriate word(s).