The central opening in the eye through which the light passes on to the retina is the
A) lens.
B) fovea.
C) cornea.
D) pupil.
E) conjunctiva.
D) pupil.
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Contraction of the circular smooth muscle in the gastrointestinal tract wall decreases the diameter of the lumen, while contraction of the longitudinal smooth muscle shortens the tract.
Answer the following statement true (T) or false (F)
Which of the following does not bear weight?
A. femur B. tibia C. fibula D. talus
The following is a list of the blood vessels that carry blood to the kidney
1. afferent arteriole 2. arcuate artery 3. interlobar artery 4. renal artery 5. glomerulus 6. cortical radiate artery 7. efferent arteriole 8. peritubular capillary What is the proper order in which blood passes through these vessels? A) 4, 6, 2, 3, 1, 5, 7, 8 B) 4, 3, 2, 6, 1, 5, 7, 8 C) 4, 3, 2, 6, 7, 5, 1, 8 D) 4, 6, 2, 3, 7, 5, 1, 8 E) 4, 3, 6, 2, 1, 5, 7, 8
What is the purpose of the triad?
A) The triad synthesizes ATP. B) The triad allows for Ca2+ release when a muscle fiber is excited. C) The triad maintains the resting membrane potential. D) The triad stores sodium. E) The triad removes acetylcholine from the synaptic cleft.