The three main classes of chemicals that act as hormones are __________, amines, and steroids

Fill in the blank with the correct word.


Answer: Peptides

Anatomy & Physiology

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Which of the following is a remnant of fetal circulation?

A. Ductus venosus B. Ligamentum venosum C. Ductus arteriosus D. Aortic sac E. Foramen ovale

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Bone cells form concentric circles around longitudinal tubes called

A) osteons. B) lacunae. C) central canals. D) canaliculi.

Anatomy & Physiology

A chemical produced in a cell that activates specific processes in response to a hormone interaction with a membrane-bound receptor is referred to as a(n) _____

A. hormone response element B. transcription factor C. messenger RNA D. intracellular mediator

Anatomy & Physiology

The ________ group of neurons contains mostly inspiratory neurons. The ________ group of neurons controls muscles used for active expiration and some inspiratory muscles.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology