Proteins synthesized at the endoplasmic reticulum become permanently separated from the cytosol as soon as they have been synthesized
Indicate whether the statement is true or false
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Which of the following is a barrier to proper nutrition?
A) Decreased saliva B) Tooth loss C) Difficulty swallowing D) All of the above
After encountering an antigen, an animal has memory cells that can produce antibodies quickly. In the absence of the antigen
A) Memory cells die off. B) Memory cells don't produce antibodies at all. C) Memory cells produce few antibodies. D) Memory cells are totally inactivated.
Which of the following happens in Malpighian tubules?
a. K+ is secreted into the lumen of the tubule. b. A V-ATPase pumps H+ ions. c. Cl- is secreted into the lumen. d. Two of these. e. None of these.
A child falls and breaks his humerus, the upper arm bone, along the epiphysial plate. Which of the following could result from this injury?
A. As an adult, red marrow will persist in the medullary cavity of the humerus. B. Blood cell production will decrease dramatically in the injured bone. C. As an adult this person will have one humerus longer than the other. D. As an adult, the diaphysis of the broken humerus will be much smaller than that of the unbroken one.