Which of the following is made possible by the expansion of the thoracic cage during pregnancy?
A. Kidneys produce more urine because her blood volume is increased
B. Cardiac output increases 30% due to her increased blood volume
C. Respiratory ventilation increases 50%
D. Decreased motility in the digestive system
Answer: C
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Intercalated disks and striations are characteristic of skeletal muscle.
a. true b. false
Because so many Na+ ions move into a cell during an action potential and so many K+ ions move out, no further action potentials can be generated in a given membrane until the Na+, K+-ATPase pumps can restore the concentration gradient
Indicate whether the statement is true or false.
Positive feedback helps to restore normal function when one of the body's physiological variables gets out of balance
Indicate whether the statement is true or false
What is the name for the partially digested fluid that passes from the stomach into the small intestine?
A. Saliva B. Bile C. Mucus D. Feces E. Chyme