The cardiovascular centers of the medulla oblongata may be subdivided into ________.
A) apneustic and pneumotaxic
B) apneustic and cardiac
C) cardiac and vasomotor
D) cardiac and pneumotaxic
E) apneustic and vasomotor
Ans: C) cardiac and vasomotor
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Which of the following organs is not part of the lower respiratory system?
A) pharynx B) trachea C) larynx D) bronchi E) alveoli
An action potential on a neuron develops when
a. threshold voltage is reached on an axon b. voltage-gated Na+ channels open c. spatial or temporal summation of graded potentials occurs to a great enough degree d. the axon hillock reaches threshold voltage e. any of the above events occur
Immunocytochemical staining for a protein called glial fibrillary acidic protein (GFAP) specifi-cally identifies which cell type in the nervous system?
a. Astrocyte b. Ganglion cell c. Microglial cell d. Motor neuron e. Oligodendrocyte
Carbon dioxide is transported by all the following means except ________.
A. dissolved gas B. bicarbonate ions C. carbonate D. carbonic acid E. carbaminohemoglobin