The ultimate source of the fluids secreted into the digestive tract is the plasma
Indicate whether the statement is true or false
T
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When is the generation of an action potential impossible, no matter the strength of the stimulus?
A) absolute refractory period B) threshold C) depolarization D) relative refractory period
The four most abundant elements in the human body are
A. calcium, hydrogen, sodium, and potassium. B. carbon, oxygen, magnesium, and zinc. C. carbon, hydrogen, oxygen, and nitrogen. D. carbon, hydrogen, oxygen, and iron. E. carbon, sulfur, calcium, and potassium.
This cross section of skin shows general cutaneous receptors. What kind of receptor does number 5 indicate?
A. Free nerve ending B. Root hair plexus C. Lamellated corpuscle D. Krause bulb E. Tactile disc
Canals between osteons that connect blood vessels and nerves from multiple central canals