An adolescent female who is hyperactive, nervous, irritable and has eyes that are protruding from their sockets is most likely suffering from ________, which is caused by ________.
A. Graves disease; oversecretion of T3 or T4 due to antibodies that mimic the effect of TSH
B. Cushings disease; oversecretion of T3 or T4 due to antibodies that mimic the effect of parathyroid hormone
C. Cushings disease; oversecretion of T3 or T4 due to antibodies that mimic the effect of TSH
D. Graves disease; oversecretion of T3 or T4 due to antibodies that mimic the effect of calcitonin
E. Graves disease; undersecretion of T3 or T4 due to antibodies that mimic the effect of TSH
Answer: A
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How can biodiversity affect the way we decontaminate industrial sites?
I) Bacteria have been found to be able to detoxify certain chemicals; perhaps there are more. II) Trees produce sawdust, which can be used to soak up chemicals. III) Species evolving in contaminated areas could adapt and detoxify the area. A) only I B) only II C) only III D) only II and III E) I, II, and III
Some botanists argue that the entire plant should be considered as a single unit rather than a composite of many individual cells. Which of the following cellular structures best supports this view?
A) cell wall B) cell membrane C) cytosol D) vacuole E) plasmodesmata
Peptide hormones are often made in advance and kept in cells awaiting signals to secrete. Where are they stored?
a. in vesicles outside the producing cell b. in vesicles in the fat layer c. in vesicles inside the producing cell d. in vesicles in the brain
Which of the following is false regarding plant
hormones? a. They are signaling molecules that travel to target cells. b. They stimulate or inhibit gene activity. c. They bind to receptors on their target cells. d. Target cells are always adjacent to the secreting cell. e. All of these are false.