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Biology, 22.06.2019 07:30
Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra
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Biology, 22.06.2019 11:00
Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.
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Biology, 22.06.2019 13:20
Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).
Answers: 2
Mathematics, 23.09.2019 17:30
Mathematics, 23.09.2019 17:30
Mathematics, 23.09.2019 17:30
History, 23.09.2019 17:30
Chemistry, 23.09.2019 17:30
Mathematics, 23.09.2019 17:30
Arts, 23.09.2019 17:30
History, 23.09.2019 17:30
Mathematics, 23.09.2019 17:30
History, 23.09.2019 17:30
Mathematics, 23.09.2019 17:30
Biology, 23.09.2019 17:30
History, 23.09.2019 17:30
History, 23.09.2019 17:30