In negative feedback mechanisms, changes away from the normal state
A) stimulate a reduction in all requirements of the body.
B) stimulate changes in the same direction.
C) stimulate changes in the opposite direction.
D) inhibit all body reactions
Answer: C) stimulate changes in the opposite direction.
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While playing in an intramural football game, Joe is tackled so hard that he breaks a rib. He can actually feel a piece of the rib sticking through the skin and he is having a difficult time breathing. Joe is probably suffering from
A) a collapsed trachea. B) an obstruction in the bronchi. C) a pneumothorax. D) decreased surfactant production. E) a bruised diaphragm.
Match each of the terms with its function or description.
a. medulla oblongata b. hypothalamus c. thalamus d. cerebellum e. gyrus f. sulcus g. corpus callosum h. spinal cord i. occipital lobe j. frontal lobe k. corpus callosum 1. _____ Structure that controls balance and muscle coordination 2. _____ Structure that contains the “vital centers” for the body 3. _____ Structure that allows the right and left sides of the brain to communicate 4. _____ Shallow groove in the cerebrum 5. _____ Primary reflex center for the body 6. _____ Structure that regulates body temperature and produces ADH 7. _____ Ridge in the cerebrum 8. _____ Structure that links sensation with emotion and is part of the alerting mechanism for the brain 9. _____ Lobe of the cerebrum that controls movement 10. _____ Lobe of the cerebrum that deals with vision 11. _____ Group of nerves that connect the right and left sides of the brain
Both first- and second-class levers operate at a mechanical disadvantage
Indicate whether the statement is true or false
In general, you become unaware of the shirt on your back because your touch receptors
A. are transducers. B. are tonic. C. undergo adaptation. D. maintain firing but are ignored.