Stomach motility
a. decreases following a heavy meal.
b. moves chime through the pyloric sphincter.
c. is unaffected by emotional state or external
environmental factors.
d. may be retarded when stretch receptors on
the stomach wall are activated.
e. is increased by hormones released in
response to high stomach acidity
B
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The type of RNA that physically interacts with a ribosome, providing the sequence information for a specific protein, is abbreviated:
A. rRNA. B. siRNA. C. mRNA. D. snRNA. E. tRNA.
Stomata open and close in response to water pressure within
A. root cells B. cell walls C. guard cells D. xylem
The part of an atom without a charge is a(n)
A. ion. B. neutron. C. electron. D. molecule.
Which of the following statements about the Rh marker allele is most accurate?
a. The Rh marker results from a single gene with two alleles. b. An individual's red blood cells carry the Rh cell surface marker if they have one or two copies of the dominant Rh marker allele. c. If a person has one or two copies of the dominant Rh marker allele then their blood type is noted as "positive", that is, B+ or B positive. d. If an individual has two copies of the recessive allele for the gene, they do not have any Rh markers, and are therefore are described as "negative", that is, B- or B negative. e. All of the above