What membrane potential must generally be met in order to achieve threshold?
A) -30 mV B) -55 mV C) -85 mV D) -70 mV
Answer: B
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The capability of the GI tract to move material along its length is called
1. Motility 2. Propulsion 3. Digestion 4. Defecation a) 1 only b) 2 only c) 3 only d) 4 only e) Both 1 and 2
Which of the following statements is most accurate?
A) Muscle tension remains relatively constant during isotonic contraction. B) T tubules may be sliding during isotonic contraction. C) The I band lengthens during isotonic contraction. D) Myofilaments slide during isometric contractions.
Which of the following is not a way in which antibodies exert their protective influence?
a. neutralization. b. agglutination. c. direct destruction of foreign organisms. d. activation of the complement system. e. enhancement of phagocytosis.
Infants born prematurely frequently develop respiratory distress syndrome of the newborn because they have too few alveoli to exchange O2 and CO2 efficiently
Indicate whether the statement is true or false.