During resting normal pulmonary ventilation, ALL of the following is TRUE EXCEPT:
a. excitatory signals reach the diaphragm via the phrenic nerve making it contract
b. pressure in the lungs decrease below atmospheric pressure during expiration
c. lung volume increase and pressure decreases during inspiration
d. relaxing the inspiratory group muscles induces normal quiet expiration
Ans: b. pressure in the lungs decrease below atmospheric pressure during expiration
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The ________ link membrane receptors to either ion channels or to membrane enzymes located on the cytoplasmic face of the membrane.
Fill in the blank(s) with the appropriate word(s).
Which of the following structures separates the thoracic cavity from the abdominopelvic cavity?
A. Liver B. Stomach C. Spleen D. Diaphragm E. Pleura
Molecules that bind to a cell's receptor and trigger a response, resulting in some kind of action or biologic effect, are called:
A) agonists. B) mediators. C) antagonists. D) neurotransmitters.
The axon is connected to the cell body at the
A) telodendria. B) synaptic knobs. C) collateral branches. D) axon hillock. E) synapse.