Which structures are reservoirs that store acetylcholine?
A. Sarcomeres
B. Lysosomes
C. Synaptic clefts
D. Synaptic vesicles
E. Terminal cisternae
Answer: D
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Which of the following components of the bone matrix is inorganic?
A. Hydroxyapatite B. Collagen C. Glycosaminoglycan D. Glycoprotein E. Proteoglycan
Which of the following is NOT a correct matching of a fetal structure with what it becomes at birth?
A) foramen ovale?fossa ovalis B) ductus venosus?ligamentum venosum C) ductus arteriosus?ligamentum teres D) umbilical arteries?medial umbilical ligaments
Dendritic or Langerhans cell function to:
a. produce melanin b. produce carotene c. help provide immunity d. produce new epidermal cells
Absorption of stray light rays (not absorbed by photoreceptors) occurs in the
A. cornea. B. choroid. C. conjunctiva. D. sclera.