Vertebral veins

A) are located within the fold of dura mater lying between the cerebral hemispheres.
B) fuse with the radial and ulnar veins.
C) travel a short distance inside the thoracic cavity to meet and merge with the external and internal jugular veins, forming the innominate vein.
D) combine to create the superior vena cava.
E) drain the posterior surface of the skull, descending within the transverse foramina of the cervical vertebrae.


E) drain the posterior surface of the skull, descending within the transverse foramina of the cervical vertebrae.

Anatomy & Physiology

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The blood cells with the longest circulating life span are the:

a. red blood cells b. granular white blood cells c. nongranular white blood cells d. both B and C have equal life spans

Anatomy & Physiology

When calcium ion binds to troponin,

A) tropomyosin moves into the groove between the helical actin strands. B) active sites on the myosin are exposed. C) troponin shifts to expose the active sites on actin. D) muscle relaxation occurs. E) myosin shortens.

Anatomy & Physiology

The gastroileal reflex

A) empties the duodenum. B) promotes gastric secretion. C) decreases peristaltic activity. D) moves some chyme to the colon. E) is relayed through the CNS.

Anatomy & Physiology

Neuron one stimulates neuron two. Neuron two stimulates an interneuron that re-stimulates neuron one and so on. What type of neuronal circuit is involved?

A) convergent pathway B) divergent pathway C) reverberating circuit D) parallel after-discharge circuit

Anatomy & Physiology