In type 2 diabetes, insulin levels are frequently normal, yet the target cells are less sensitive to the effects of insulin. This suggests that the target cells
A) may have a defect in their signal transduction pathway.
B) are impermeable to insulin.
C) have adequate internal supplies of glucose.
D) cannot convert insulin to an active form.
E) None of these answers are correct.
A) may have a defect in their signal transduction pathway.
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Cathy develops a tumor in her brainstem that puts pressure on the respiratory centers. Her doctor notices that control of her diaphragm is abnormal and irregular movements occur during inspiration. Responses to sensory input are delayed and abnormal. Which specific respiratory center must be receiving pressure from the tumor?
A. The ventral respiratory group B. The diencephalon C. The pontine respiratory group D. The dorsal respiratory group
The parts of an amino acid that are important in the protein buffer system are the
A. amino and R groups. B. monocarbonate and bicarbonate groups. C. amino and carboxyl groups. D. monohydrogen phosphate and dihydrogen phosphate groups.
Answer the following statements true (T) or false (F)
1. The terms energy level and electron orbital are interchangeable. 2. Elements are pure substances. 3. The terms molecule and compound are interchangeable. 4. A formula of a compound tells you the number and types of elements that make up that compound. 5. The elements sodium, oxygen, hydrogen, and nitrogen make up 96% of the human body.
The most prevalent of skeletal muscle fibers in the body are ________ fibers.
A. fast-twitch B. slow-twitch C. intermediate