Which of the following statements concerning the digestive system of a newborn is true?
A. The infant may lose 15% to 20% of his body weight in the first week.
B. The pH of the stomach is nearly neutral, but increases in acidity after birth.
C. The liver of the newborn is functionally mature.
D. The ability to digest lactose does not occur until 48 hours after birth.
E. All foods can be digested at birth.
B
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Which layer of the small intestine wall contains cells with microvilli?
A. submucosa B. mucosa C. muscularis D. serosa E. adventitia
There are different types of pumping structures in animal circulatory systems. Describe the three different types. How is one-way flow ensured?
What will be an ideal response?
An individual steps on a nail with her left foot. In response to this, what reflex responses should occur?
A. Both the flexors and extensors of the ipsilateral side would contract. B. The extensor muscles of the right leg will contract to maintain balance. C. Only the flexors on the contralateral side would contract. D. The flexor muscles of the left leg will contract to maintain balance.
Sensory encoding of the perceived location of a stimulus depends on
A) the frequency of action potentials. B) which labeled line is active. C) the specific location of the cortical neuron that is stimulated. D) the specific sensitivity of the peripheral receptor. E) the number of receptors stimulated.