The structure in the fetus that allows the blood to bypass the lungs is the:
a. ductus venosus
b. ductus arteriosus
c. foramen ovale
d. both B and C above
d. both B and C above
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The three modifications of the small intestine mucosa that greatly increase the surface area available for absorption are ____________________, ____________________, and ____________________
Fill in the blank(s) with correct word
The individual pressure exerted independently by a particular gas within a mixture of gases is known as its ______________
a. diffusion pressure b. partial pressure c. gradient pressure d. equilibrium pressure e. total pressure
The tip region of the photoreceptor cells are removed by cells of the retinal pigment epithelium by ________.
A. phagocytosis B. opsin C. apoptosis D. the bleaching reaction
John experienced a cut that severed the tendon that attaches the insertion of the gastrocnemius muscle. As a result of this injury, what action is difficult for him to perform?
A) inversion of the foot B) eversion of the foot C) plantarflexion D) dorsiflexion