In comparing simple diffusion to facilitated diffusion, you note that ________

A) both require ATP
B) both require a specific carrier or protein channel
C) both can move substances up, as well as down, a concentration gradient
D) both require a concentration gradient


Answer: D

Anatomy & Physiology

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What is the correct order of structures as you move from outside a muscle cell, to deep inside it?

A) fiber, myofibril, myofilament B) myofilament, fiber, myofibril C) myofibril, myofilament, fiber D) myofilament, myofibril, fiber

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Heme released from hemoglobin in aged red blood cells is decomposed in the liver into

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An increase in the circulating number of ____ is associated with parasite infestations

a. neutrophils b. eosinophils c. basophils d. lymphocytes e. monocytes

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