The main function of cristae is to
A) supply enzymes for reactions.
B) facilitate diffusion of substances into the mitochondria.
C) increase the surface area for chemical reactions.
D) increase chemical transport in mitochondria.
C
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What structure folds over the glottis during swallowing to prevent solids and liquids from entering the larynx, and ensures the passage of air from the laryngopharynx to the larynx?
A. Trachea B. Larynx C. Pharynx D. Epiglottis
How do calcium ions effect the changes leading to muscle contraction?
Fill in the blank(s) with the appropriate word(s).
In cell-mediated immunity, the antigen (pathogen) is destroyed by:
a. Mast cells b. Cytotoxic killer T cells c. Opsinization of antibodies d. Plasma cells
In a nephron, the long tubular passageway through which the filtrate passes includes the __________.
a. proximal and distal convoluted tubules and the nephron loop b. collecting tubule, collecting duct, and papillary duct c. renal corpuscle, renal tubule, and renal pelvis d. nephron loop and the collecting and papillary ducts