Each spinal nerve (except C1) receives sensory information from a specific region of the skin called a ________.
Fill in the blank(s) with the appropriate word(s).
dermatome
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Reflexes that control vital organs are classified as ________ reflexes.
Fill in the blank(s) with the appropriate word(s).
Why is the rate of CO2 exchange roughly equivalent to that of O2 despite its less steep pressure gradient?
A. CO2 diffuses much more rapidly out of the cells. B. CO2 binds to O2 and moves across the respiratory membrane simultaneously. C. CO2 is more soluble in water than is O2. D. CO2 is actively transported into the alveoli.
A consequence of lack of vasopressin is excretion of sugar in the urine, which occurs in the condition diabetes mellitus
Indicate whether the statement is true or false.
Chemical synapses are characterized by
A. the release of neurotransmitter by the presynaptic terminal. B. connexons that connect the pre- and postsynaptic cells. C. the presence of receptors for neurotransmitters on the presynaptic terminal. D. the absence of gap junctions. E. receptors located only on the presynaptic terminal.