Biology, 01.02.2021 18:10 jordanrini
Fragments of rock or lava that are sent into the air in a volcanic explosion are called
A) fumaroles
B) tephra
C) aggregates
D) cations
E) soil peds
Answers: 3
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What factors contribute to the effect an environmental toxin has on the human body?
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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
Biology, 22.06.2019 15:10
Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?
Answers: 1
Fragments of rock or lava that are sent into the air in a volcanic explosion are called
A) fumarole...
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