Insects Can Beat Their Wings at Exceptionally High Frequencies Because

Multiple Choice

Insects can beat their wings at exceptionally high frequencies because

A) their wing muscles have mostly fast-twitch fibers.
B) their motor neurons can fire action potentials at a very high frequency.
C) their wings have exoskeletal supports.
D) their wing muscles have extensive sarcoplasmic reticulum that cycles Ca²⁺ very fast.
E) their wing muscles can generate a rapid oscillation of contraction asynchronous with motor neuron firing.