Which of these junctions represents the connection between the tip of a neuron and a skeletal muscle cell from which acetylcholine diffuses?
A) neurotic
B) tight
C) neuromuscular
D) desmosome
C
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Which organisms would most likely be present on the bottom or closest to the actual surface of a complex microbial biofilm?
A. Facultative chemoorganotrophs B. Anaerobic sulfate-reducing bacteria C. Eukaryotic protists D. Cyanobacteria
In muscle function at the sarcomere level, the formation of cross-bridges is regulated by the binding of ___ ions to ____.
A. calcium, troponin B. calcium, tropomyosin C. calcium, myosin D. sodium, troponin E. sodium, tropomyosin
The female sex cells develop in paired organs in the abdomen called ________.
A) ovaries B) oocytes C) vagina D) clitoris
Members of phylum Ctenophora are diploblastic but lack cnidocytes
____________________ Indicate whether the statement is true or false.