In order for a cancer to develop, cells must be capable of breaking away from neighboring cells, and they must ignore growth-inhibitory signals from other cells, resulting in uncontrolled growth and cell division
Indicate whether the statement is true or false
TRUE
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Although energy cannot be created or destroyed, energy transformations are not 100% efficient. Why?
a. Energy is lost as an increase in heat. b. Energy is lost as an increase in entropy. c. Energy is lost as a change in free energy. d. Energy is lost as a decrease in heat. e. Energy is lost as a decrease in entropy.
The point at which this neuron will be able to
generate another action potential is indicated by a. A. b. B. c. C. d. D. e. E.
Increases in temperatures have been associated with ________ in the body size of endothermic animals
Fill in the blank(s) with correct word
Muscle contraction is triggered
A. by the nerve releasing a neurotransmitter, which triggers a flow of calcium that releases ATP and begins the actin filaments sliding across the myosin binding sites. B. by release of a neurotransmitter at a synapse that directly causes actin and myosin to slide. C. by the nerve releasing a neurotransmitter, which triggers a flow of calcium that attaches to actin filaments and exposes the myosin binding sites. D. when high levels of oxygen and sugar are released by the sarcolemma. E. when a surplus of ATP is released by a nerve motor unit.