Hormones that enter target cells and bind to receptors in the cytoplasm and then enter the nucleus are called:
Correct answer: A. Steroid hormones
- A. Steroid hormones
- B. Water-soluble hormones
- C. Peptide hormones
- D. Second messengers
Explanation
Steroid hormones are derived from cholesterol and are lipid-soluble molecules. Due to their lipid nature, they can diffuse through the cell membrane. Once inside the cell, they bind to specific receptors located in the cytoplasm. This hormone-receptor complex then translocates into the nucleus, where it acts as a transcription factor, directly influencing gene expression.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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