Steroid hormones and thyroid hormones ______ pass across the plasma membrane; they cause the target cells to _______ that produce the characteristic effects of the hormones.
A)can; activate or inactivate the cellular enzymes
B)cannot; activate or inactivate the cellular enzymes
C)cannot; synthesize specific proteins
D)can; synthesize specific proteins

Question

Quizplus · Accepted Answer

Steroid hormones and thyroid hormones can pass across the plasma membrane, and they bind to specific receptors inside the target cells, where they act as transcription factors regulating gene expression. The activated receptors complex with specific DNA sequences, stimulating gene transcription and producing specific proteins, which carry out the physiological effects of the hormones. Therefore, they can synthesize specific proteins.

Steroid Hormones and Thyroid Hormones ______ Pass Across the Plasma