A plastic baggie should never be used to capture a fish
Indicate whether the statement is true or false
F
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Lowered extracellular K+ levels will lower the heart rate because
A. ectopic action potentials occur. B. the resting membrane potential is hyperpolarized. C. it blocks Ca2+ channels. D. action potential amplitude declines. E. more Na+ channels open.
Which muscle type can contract on its own, without nervous or endocrine input? Choose all that apply.
A. Cardiac B. Skeletal C. Smooth
The lack of extensive divergence of parasympathetic preganglionic axons prevents the mass activation seen in the sympathetic division.
Answer the following statement true (T) or false (F)
The extraembryonic membranes include the following structures EXCEPT the ________.
A. amnion B. chorion C. yolk sac D. embryonic disc E. allantois