The cellular abnormality that causes cystic fibrosis is
A. absence of the ability to feel pain.
B. abnormal potassium channels in heart muscle.
C. abnormal chloride channels that trap salt inside cells lining the lung passageways.
D. extra receptors for a growth factor.
Answer: C
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Menstrual cramps are most commonly caused by
A. increased prostaglandin secretions. B. increased estrogen secretion by the ovary. C. increased FSH levels. D. increased HCG hormone release. E. a decreased inflammatory response in the endometrium.
The figure illustrates bones of the right upper limb. What does "E" represent?
A. Carpals B. Phalanges C. Radius D. Ulna E. Metacarpals
Why can cystic fibrosis become lethal?
What will be an ideal response?
Most metabolic and regulatory functions in a neuron happen where?
A. The axon B. The Schwann cell C. The axon hillock D. The dendrites E. The cell body or soma