The sudden onset of disabling fatigue that occurs when the limited amount of stored glycogen falls below a certain level during heavy, prolonged exercise is known as
A. glycogen deficiency syndrome.
B. hitting the wall.
C. that "pooped" feeling.
D. carbohydrate unpacking.
B. hitting the wall.
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Some types of dinoflagellates (single-cell eukaryotes) are photosynthetic. They have flagella and can swim through the water. If you grow them in a container that is lit from the right side, the cells will swim to the right side of the container
This result suggests that ___________. A. dinoflagellates sense light B. dinoflagellates sense the Earth's magnetic field C. dinoflagellates sense a heterotrophic food source D. dinoflagellates swim in random directions E. dinoflagellates swim in response to temperature gradients
The same bacteria that are associated with periodontitis are associated with:
a. atherosclerosis b. the common cold c. influenza d. tuberculosis e. stomach ulcers
Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced. Bicarbonate is acting as a ________ in blood.
A. alkaline B. base C. buffer D. acid
Which of the following does NOT describe the autonomic nervous system?
A) Neurons release norepinephrine or acetylcholine onto their target organ. B) It is subdivided into sympathetic and parasympathetic divisions. C) It regulates heart rate. D) It controls voluntary movements. E) It forms synapses with smooth muscles in blood vessels.