Which of the following statements is TRUE?
A. The coordinated activity of the organ systems is necessary for normal function.
B. Because organ systems are so interrelated, dysfunction in one organ system can have profound effects on other systems.
C. An organism is any living thing considered as a whole whether composed of one cell such as a bacteria or trillions of cells such as a human.
D. Living things are highly organized and disruption of this organized state can lead to loss of function and death.
E. All of these statements are true
E
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When you walk up the stairs, your hip and knee joints __________ to lift your body weight.
A. rotate B. abduct C. adduct D. flex E. extend
The prevention of change, by ignoring minor variations and maintaining a normal range rather than a fixed value, is characteristic of
A) positive feedback. B) stimulus reinforcement. C) negative feedback. D) effector control. E) both positive and negative feedback loops.
The process that breaks down organic substrates, releasing energy that can be used to synthesize ATP or other high-energy compounds, is __________.
a. oxidation b. metabolism c. catabolism d. anabolism
A single, brief contraction and relaxation cycle in a muscle fiber is called a muscle __________.
A) cramp.
B) twitch.
C) tetanic contraction.
D) action potential.
E) motor unit.