White matter of the spinal cord develops from the

A) mantle layer.
B) marginal layer.
C) notochord.
D) neurocoel.
E) neuroepithelial l


B) marginal layer.

Anatomy & Physiology

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In animals insulated with fur or feathers, __________ heat loss is reduced

A) Convective B) Conductive C) Radiant D) More than one of the above Fill in the blank with the correct answer.

Anatomy & Physiology

The central chemoreceptors for respiration are located in the ________; they monitor the blood concentration(s) of ________.

A. aortic and carotid arteries; oxygen B. pons; carbon dioxide and hydrogen ions C. medulla oblongata; oxygen D. pons; oxygen E. medulla oblongata; carbon dioxide and hydrogen ions

Anatomy & Physiology

The structural units of mature compact bone are called

A) lacunae. B) osteocytes. C) osteons. D) canaliculi. E) lamellae.

Anatomy & Physiology

The term central nervous system refers to the ________.

A) autonomic nervous system B) brain, spinal cord, and peripheral nerves C) brain and spinal cord D) spinal cord and spinal nerves

Anatomy & Physiology