In a woman’s monthly cycle, the hormone _____________ is released when estrogen reaches a peak
A. lutenizing hormone D. testosterone
B. oxytocin E. human chorionic gonadotrophin
C. progesterone
A
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The primary advantage of gills versus the body surface for gas exchange in aquatic animals is that ________.
A. gills are located near the mouth B. gills have a much greater diffusion surface area C. gills decrease resistance to movement D. all gills contain a countercurrent exchange system
The appendix is a vestigial structure in humans
Indicate whether the statement is true or false.
Cells or cell parts that detect a stimulus are called
a. effectors. b. integrators. c. sensory receptors. d. regulators. e. detectors.
The receptors that detect linear motion ____
a. have cilia embedded in a cupula b. are located in the utricle and sacculae c. are found at the base of each semicircular canal d. respond best to spinning movements e. are contained in an air-filled space