Some people can detect PTC, a bitter compound found in broccoli and Brussels sprouts, whereas others cannot. Which of the following is the most likely explanation for this observation?
A. The G protein pathway that alters the
conformation of the sodium channels is
defective.
B. Chemoreceptors specific for PTC are not
expressed.
C. Too few sodium channels are present in
the taste receptors.
D. Neurotransmitter release from these taste
receptors is impaired.
B
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The kidneys are protected by ____ tissue
a. adipose b. loose irregular connective c. dense regular connective d. stratified cuboidal epithelium e. simple squamous epithelium
Red algae can live in deeper water because of their
a. phycobilins. b. holdfasts. c. chlorophyll a. d. stonelike cell walls. e. preference for freshwater habitats.
Which sequence is correct?
A) left ventricle > aorta > coronary artery B) right atrium > superior vena cava > coronary artery C) left atrium > superior vena cava > renal artery D) right ventricle > aorta > renal vein
If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide.
Answer the following statement true (T) or false (F)