From the passage, it says that FSH is s peptide hormone.
Why is D incorrect? I remember reading that all peptide hormones are derived from tyrosine. (this sounds pretty extreme though)
1. Why is B incorrect? is it plasma membrane of blood vessel, and not endocrine cell.
2. Since FSH is hydrophilic, it would be secreted from the endocrine cell and diffuse into the blood vessel. On the other hand, a steroid hormone would need a carrier protein to enter the blood vessel, correct?
3. Are peptide hormones always hydrophilic? (this sounds pretty extreme too...)