Vibration of the organ of Corti causes bending of stereocilia on the hair cells by a shearing force as the cilia push against the tectorial membrane

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#Id: 4029

#Unit 7. System Physiology – Animal

The effects of the autonomic nervous system on heart rate are called chronotropic effects

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#Id: 3162

#Unit 11. Evolution and Behavior

Natural selection was Darwin’s brilliant hypothesis, independently conceived by Wallace, that accounts for adaptations, features that appear “designed” to fit organisms to their environment.

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#Id: 1266

#Unit 7. System Physiology – Animal

Zona glomerulosa cells capable of secreting significant amounts of aldosterone because they contain the enzyme aldosterone synthase.

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#Id: 7370

#Unit 5. Developmental Biology

Gap genes encode transcription factors, and differing combinations and concentrations of gap gene proteins regulate the transcription of pair-rule genes, which divide the embryo into periodic units.

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#Id: 6388

#Unit 2. Cellular Organization

Catabolite repression is exerted through a second messenger called cyclic AMP (cAMP) and the positive regulator protein called the catabolite repressor protein (CRP), a dimer.