In the ascending limb of the nephron loop the ________
A) thick segment moves ions out into interstitial spaces for reabsorption
B) thin segment is freely permeable to water
C) thin segment is not permeable to sodium and chloride
D) thick segment is permeable to water
A
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Aldosterone increases reabsorption of the electrolyte __________________ while increasing secretion of the electrolyte ___________________.
Fill in the blank(s) with the appropriate word(s).
Surfactant is necessary to prevent collapse of the alveoli in the lung because in its absence, water molecules
A. are more strongly attracted to each other by van der Waals forces. B. congregate around nearby proteins to which they adhere. C. vaporize and take up much less space. D. are more strongly attracted to each other by cohesive forces.
A skeletal muscle twitch differs from a tetanic contraction in that ________
A) the tetanic contraction is considered abnormal, while the twitch is a normal muscle response B) the tetanic contraction is caused by a single stimulus, while the twitch is caused by very rapid multiple stimuli C) the muscle twitch is prolonged and continuous while a tetanic contraction is brief and "jerky" D) the muscle twitch occurs only in small muscles while a tetanic contraction occurs in large muscle groups E) the muscle twitch is a brief and "jerky" movement, while the tetanic contraction is prolonged and continuous
The urinary bladder is found within the hypogastric region of the abdomen.
Answer the following statement true (T) or false (F)