Which of the following serves to increase the surface area of a cell?
A. Microvilli
B. The nucleolus
C. Centrioles
D. Microfilaments
Answer: A
Anatomy & Physiology
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The cytoskeleton component composed mainly of the protein actin is a __________.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology
During skeletal muscle contraction, ________.
A. Ca2+ associates with tropomyosin B. thin filaments slide across thick filaments C. the H band increases in size D. myosin heads interact with tropomyosin
Anatomy & Physiology
________ molecules are compounds that contain carbon as the primary structural atom
A) Complex B) Inorganic C) Exergonic D) Endergonic E) Organic
Anatomy & Physiology
What transport process can create a concentration gradient for sodium across the plasma membrane?
a. osmosis b. phagocytosis c. facilitated diffusion d. active transport e. passive diffusion
Anatomy & Physiology