Nitrogen atoms can form a maximum of four covalent bonds with other atoms
Indicate whether the statement is true or false.
FALSE
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Which of the following statements pertaining to the pharynx is incorrect?
A) The internal laryngeal nerve passes through the gap between the middle and inferior constrictors. B) The maxillary and vagus nerves predominantly supply the pharynx with sensory innervation. C) The inferior constrictor muscle receives some motor innervation from the external laryngeal nerve. D) The palatine tonsil receives some blood via a branch of the facial artery. E) The pharyngeal "tonsillar ring" refers to an incomplete ring of lymphoid tissue within the pharynx.
Segmentation contractions:
a. occur in the stomach b. are suppressed by acetylcholine c. are initiated by pacemaker cells d. occur in the colon e. quickly propel chyme through the small intestines
Enzymes which finish chemical digestion:
a. are found in the duodenum b. are found in the brush border c. are found in the stomach d. include salivary amylase and pepsin e. are located throughout the digestive tract from beginning to end
Somites give rise to
A. nerves. B. blood. C. glands. D. muscles. E. spinal cord.