Heat stroke is more likely to occur on overexertion during a prolonged exposure to a:
a. hot, humid environment
b. hot, dry environment
c. cold, humid environment
d. cold, dry environment
e. wet, rainy environment
a
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A patient is hyperventilating. The "blowing off" of excessive carbon dioxide causes a decrease in blood H+ concentration
How can the carbonic acid-bicarbonate buffer system function to correct this imbalance? CO2 + H2O ? H2CO3 ? H+ + HCO3- A) HCO3- binds with H+ to form H2CO3 and lower pH B) HCO3- binds with H+ to form H2CO3 and raise pH C) H2CO3 dissociates to form more H+ and lower pH D) H2CO3 dissociates to form more H+ and raise pH
What hormone stimulates uterine contractions during labor and milk-ejection during lactation?
A. ADH B. Oxytocin C. Luteinizing hormone D. Prolactin
Which of the following best describes the sarcoplasmic reticulum?
A) protein that accounts for elasticity of resting muscle B) repeating unit of striated myofibrils C) storage and release site for calcium ions D) thin filaments are anchored here E) largely made of myosin molecules
Which of the following muscles acts to flex the finger joints and wrist?
A) brachioradialis B) flexor digitorum C) flexor carpi ulnaris D) pronator teres E) flexor carpi radialis