Which of the following factors will not influence the rate at which a meal will empty from the stomach?
a. fat in the duodenum.
b. acid in the duodenum.
c. caffeine in the duodenum.
d. hypertonicity of the duodenal contents.
e. distention of the duodenum.
C
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Active sites become exposed when calcium ions bind to
A) tropomyosin. B) actin. C) myosin. D) troponin. E) calcium channels.
In simple autosomal inheritance, phenotypic characters are determined, or controlled, by
A) a single pair of alleles. B) multiple alleles. C) the action of a single gene. D) regulator genes on a different chromosome. E) the genes on the Y chromosome.
In the cellular immune response,
A) T cells attack healthy body cells. B) T cells attach directly to antigens and destroy them. C) T cells produce antibodies directly against antigens. D) B cells produce antibodies directly against antigens.
During the micturition reflex, the motor neuron supplying the external urethral sphincter is stimulated
Indicate whether the statement is true or false