A nerve cell and a muscle cell have the same genes, but express different subsets of
them.
Indicate whether the statement is true or false
TRUE
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Two receptors, A and B, can bind the same chemical signaling molecules but the concentration of those molecules required to reach 50% saturation is twice as great for receptor B. Therefore, the receptors have the same ________, but different ________.
A. affinity; competition B. specificity; affinity C. affinity; specificity D. specificity; saturation E. competition; affinity
Scabies is caused by egg-laying mites.
Answer the following statement true (T) or false (F)
Urea recycling can cause a buildup of urea in the
a) renal capsule b) nephron loop c) ascending tubule d) renal medulla e) renal pelvis
Which of the following hormones stimulates the synthesis of testosterone by the fetal testes?
A. human chorionic gonadotropin (hCG) B. follicle-stimulating hormone (FSH) C. gonadotropin-releasing hormone (GnRH) D. luteinizing hormone releasing hormone (LH-RH) E. estrogen