Which nervous system division controls muscle contraction and secretion in the digestive system?
A. Afferent nervous system
B. Sympathetic nervous system
C. Enteric nervous system
D. Somatic motor nervous system
Answer: C
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The reactions of the Krebs cycle
A. take place in the cytosol of human cells. B. generate ATP directly by substrate-level phosphorylation. C. take place only when no oxygen is present. D. are important for the metabolism of carbohydrates but not other molecules. E. produce pyruvate and lactate as end products.
During skeletal muscle contraction, more force is created when more motor units are activated
Indicate whether this statement is true or false.
The dermis is composed largely of
A) adipose. B) fluid connective. C) dense irregular connective. D) muscle. E) neural.
A cell contains the following membrane transporters:
Na+ channel K+ channel Na+,K+-ATPase The resting membrane voltage of the cell is –80 mV and the intracellular and extracellular ion concentrations are: Intracellular (mEq/L) Extracellular (mEq/L) Na+ 10 145 K+ 120 4 The cell is treated with a drug to inhibit the Na+,K+-ATPase. What would be the effect of this drug on the following parameters? Intracellular [Na+] Intracellular [K+] Cell volume Membrane voltage A. decrease decrease decrease depolarize B. increase decrease increase depolarize C. increase increase increase no change D. decrease increase decrease hyperpolarize E. increase increase decrease hyperpolarize