How are the bones of the human female pelvis different from those of the human male pelvis?
Answer: Iliac bones are more flared
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If Raf is mutated so that it is "on" constitutively, what is the effect on the cell?
a) the cells lose growth control b the cells dedifferentiate c) the cells increase in volume permanently d) the cells differentiate e) the cells stop dividing
Explain how the centromere-drive hypothesis accounts for rapid evolution at the centromeres
What will be an ideal response?
When a steroid hormone and a peptide hormone exert similar effects on a population of target cells, then _____
A) the steroid and peptide hormones must use the same biochemical mechanisms B) the steroid and peptide hormones must bind to the same receptor protein C) the steroid hormones affect the synthesis of effector proteins, whereas peptide hormones activate effector proteins already present in the cell D) the steroid hormones affect the activity of certain proteins within the cell, whereas peptide hormones directly affect the processing of mRNA E) the steroid hormones affect only the release of proteins from the target cell, whereas peptide hormones affect only the synthesis of proteins that remain in the target cell
A patient has a heart attack and wakes up in the hospital. He gets a visit from his doctor, who says he had to shock the patient's heart because part of it had gone into fibrillation
The doctor jokes that it could have been worse if the other part of the heart had been in fibrillation and that the patient was really lucky. Which chambers of the heart in the patient were in fibrillation, the atria or the ventricles?