The inner cavity of the blastocyst is called the ________.
Fill in the blank(s) with the appropriate word(s).
blastocoele
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The filum terminale anchors the inferior end of the spinal cord to the
A. L2 vertebra. B. S5 vertebra. C. L1 vertebra. D. sacrum. E. coccyx.
The refusal to eat because of a fear of being overweight is a condition called ______________________________
Fill in the blank(s) with correct word
Which is NOT typically a step in the cAMP second-messenger system?
A. A first messenger binds to a transmembrane receptor. B. There is dissociation of G-protein subunits. C. An activated G-protein subunit phosphorylates cAMP-dependent protein kinase. D. Adenylyl cyclase converts ATP into cAMP. E. Active cAMP-dependent protein kinase phosphorylates cell proteins.
In this close-up image of a lung, what structure does number 1 indicate?
A. Alveolar duct B. Respiratory bronchiole C. Terminal bronchiole D. Bronchiole E. Alveolus