In the nucleus, DNA is complexed with proteins to form a fine filamentous material called _______________.
Fill in the blank(s) with the appropriate word(s).
chromatin
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If an individual was lacking a key amino acid and so couldn't make and release substance P, what would happen?
A. There would be a surge in activity in neurons that synthesize opiate neurotransmitters. B. There would be increasing sensation of pain generated by the brain, with or without any damage to structures in the periphery. C. They would experience a lack of sensation in some pain pathways. D. There would be an increase in activity in neurons that detect painful stimuli in internal organs. E. Synaptic activity in afferent neurons associated with pain receptors can be inhibited by axon-axon synapses with neurons from descending pathways.
Which of the following describes the action of the digastric muscle?
A) elevates the larynx B) elevates the larynx and depresses the mandible C) depresses the larynx D) depresses and retracts the tongue E) elevates the mandible
Ectoderm is to ________ as mesoderm is to ________
A) neural tissue; muscle tissue B) cardiovascular system; neural tissue C) mesoderm; endoderm D) neural tissue; epithelial tissue E) muscle tissue; neural tissue
The largest of the paranasal sinuses is (are) located within which of the following bones?
A) frontal bone B) ethmoid C) sphenoid D) nasal bone E) maxillae