Five-year-old Charlie is angry he can't continue to play so he holds his breath. His carbon dioxide levels continue to climb and his parents are concerned what will happen to him. Predict how the respiratory system handles the rising carbon dioxide levels
What will be an ideal response?
As carbon dioxide levels increase, the pH of the blood decreases becoming more acidic. The respiratory centers in the brain stimulate the inspiratory muscles to contract and increase the breathing rate. Hyperventilation produces breathing that is deeper and more rapid than eupnea (normal breathing) and removes more carbonic acid from the blood. Carbon dioxide is the primary stimulus for breathing; oxygen becomes an important stimulus when levels become dangerously low.
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Potentially damaging stimuli that result in pain are selectively detected by ________.
A) interoceptors B) photoreceptors C) nociceptors D) proprioceptors
Explain the role of glycogen in cellular metabolism
A) It is the primary fuel that enters glycolysis. B) It is the primary fuel that enters the citric acid cycle. C) It is the primary fuel that enters the electron transport chain. D) It serves as an intracellular glucose reserve. E) It can easily be converted to other non-carbohydrate fuel sources.
Discuss the importance of calcium ions in skeletal muscle contraction
What will be an ideal response?
The scapula is part of the ________ girdle.
Fill in the blank(s) with the appropriate word(s).