The muscle term deltoid refers to what shape of the muscle?
A) flat
B) circle
C) triangle
D) trapezoid
C
Explanation:
A) The term deltoid does not refer to a flat-shaped muscle.
B) The term deltoid does not refer to a circular shape.
D) The term deltoid does not refer to a trapezoid-shaped muscle.
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Choose the correct statement about muscle contraction.
A. Cross-bridges form between actin and the sarcolemma. B. Actin filaments slide along myosin filaments. C. Filaments of troponin and tropomyosin slide past one another. D. Tropomyosin molecules move and expose specific sites on myosin filaments.
When telomeres get too short after repeated cell divisions,
A) the cell dies. B) the cell becomes cancerous. C) the cell stops dividing. D) the chromosomes uncoil. E) the cell divides more frequently.
An important regulator of electrolyte concentrations in extracellular fluids is ________
A) cortisol B) insulin C) glucagon D) aldosterone
Adenine and guanine are
A) purines represented by T and C. B) pyrimidines represented by A and G. C) purines represented by A and G. D) pyrimidines represented by T and C. E) nucleotides represented by A and G.