Explain Why the Steroid Hormone Estradiol (MW 272)readily Crosses Membranes

question 36

Essay

Explain why the steroid hormone estradiol (MW 272)readily crosses membranes by simple diffusion but the much smaller H⁺ requires transport proteins.

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Definitions:

Memories

Stored information and experiences in the brain that can be recalled for future use.

Phrenology

A now-debunked theory that proposed the shape and size of the cranium could be used to infer personality traits, character, and mental abilities.

Functional Magnetic Resonance Imaging (fMRI)

A neuroimaging technique that measures brain activity by detecting changes associated with blood flow, used to observe mental functions.

Blood Flow

The movement of blood through the circulatory system, delivering oxygen and nutrients to tissues and removing waste products.