Which of the following statements about swallowing is false?
A. It is a series of voluntary motions of the
roof of the mouth, tongue, and epiglottis.
B. It is under the control of the autonomic
nervous system.
C. It conveys food from the pharynx through
the esophagus and into the stomach.
D. The tongue pushes a bolus of food to the
rear of the mouth cavity to initiate swallowing.
E. None of these statements about
swallowing is false.
A
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When receptors coupled to phospholipase C are activated, calcium levels in the cytosol increase when ______
A. diacylglycerol binds to ligand-gated channels on the endoplasmic reticulum, releasing calcium. B. IP3 binds to ligand-gated channels on the plasma membrane, releasing calcium. C. diacylglycerol binds to ligand-gated channels on the plasma membrane, releasing calcium. D. IP3 binds to ligand-gated channels on the endoplasmic reticulum, releasing calcium. E. phospholipase C phosphorylates the receptor leading to calcium production.
What describes placental mammalian embryos?
A. They are born immediately after fertilization. B. They develop inside a leathery shell. C. They complete development in a pouch. D. They hatch from an internal egg. E. They are totally dependent on the mother for complete development.
Which process provides the carbon dioxide you exhale?
A) aerobic respiration B) anaerobic respiration C) glycolysis D) transpiration
In his work with pneumonia-causing bacteria and mice, Griffith found that __________.
A. heat-killed pathogenic cells caused pneumonia B. the protein coat from pathogenic cells was able to transform nonpathogenic cells C. the polysaccharide coat of bacteria caused pneumonia D. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic