A muscle fiber generates maximum contractile force when
A) it has been stretched excessively.
B) it receives repeated action potentials from a motor neuron.
C) it has been exposed to creatine phosphate.
D) some of the myofibrils contract and then relax at the same time.
B
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The notion that the genetic code is universal suggests a common ancestor for all living organisms Indicate whether the statement is true or false
Which of the following are part of the endomembrane system?
a. lysosomes and Golgi apparatus b. nuclear envelope and peroxisomes c. vesicles and mitochondria d. vacuoles and vesicles
The __________ deliver(s) nutrient-rich blood from
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