15. When blood glucose levels are elevated, insulin issecreted by (be as specific as possible)
​a. pancreatic acini
​b. pancreatic islets
​c. alpha cells
​d. beta cells
​e. delta cells
16. Proprioceptive information for posture, balance andskilled movement is conducted via the
​a. posterior funiculus and medial lemniscal tract
​b. anterolateral tract
​c. spinocerebellar tract
​d. pyramidal pathway
​e. indirect pathway
17. Valves are found in
​a. heart
​b. veins
​c. arteries
​d. a and b
​e. all of the above
18. The parietal pericardium
​a. is continuous with the parietal pleura
​b. is composed of a fibrous and a serous layer
​c. forms a protective sac for the heart
​d. secretes serous fluids
​e. is also known as the epicardium
19. The two largest veins of the body are the
​a. opthalmic and internal jugular veins
​b. inferior and superior vena cavae
​c. external jugular and occipital veins
​d. brachiocephalic and subclavian veins
​e. internal and external jugular veins
20. The thin strand of pia mater that anchors the distalspinal cord in the vertebral column is the
​a. denticulate ligament
​b. posterior rootlet
​c. filum terminale
​d. conus meduallaris
​e. pons
21. The major relay for sensory pathways is the
​a. pons
​b. thalamus
​c. medulla oblongata
​d. brainstem
​e. cerebrum
