The pelvic diaphragm supports the pelvic viscera
Indicate whether this statement is true or false.
TRUE
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The corticospinal pathways
A. bring sensory information from the spinal cord to the somatosensory region of the cerebral cortex. B. consist of many interneurons linked synaptically. C. begin in the cortex of the cerebellum. D. are composed of alpha motor neurons. E. are descending motor pathways.
Which of the following is secreted by the stomach?
a. gastrin b. galactase c. secretin d. ptyalin
Explain the function of sodium-potassium ion pumps
A) They generate ATP for the cell during the electron transport chain when hydrogen ions move in a process known as chemiosmosis. B) The sodium-potassium ion pump binds acetylcholine across the synaptic cleft to generate an action potential at the sarcolemma. C) The sodium-potassium ion pump allows facilitated diffusion of potassium during the repolarization of a muscle cell. D) The sodium-potassium ion pump allows facilitated diffusion of sodium during the depolarization of a muscle cell. E) The sodium-potassium ion pump maintains the resting membrane potential of a cell by exporting three sodium ions out in exchange for two potassium ions entering the cell.
The composition of alveolar air differs from atmospheric air. Indicate all of the factors that account for this difference
Nitrogen does not enter alveoli Difference in overall (total) pressure Presence of water vapor Gas exchange adds carbon dioxide Gas exchange removes oxygen