Which of the following is NOT one of the signs of aging in the skin?
a. increased collagen
b. reduced fibroblasts
c. increase in sweat glands
d. less pigmentation in hair
e. increased fat deposits
C
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Which hormone is released by cardiac cells in response to stretching caused by high blood pressure?
a. growth hormone b. triiodothyronine c. atrial natriuretic peptide d. erythropoietin
The structure identified by the arrow is _____
1.the round window, which is activated by the stirrup
2.the cochlea, made up of the vestibular duct and the tympanic duct
3.the organ of Corti, which is made up of hair cells
4.the tympanic membrane, which vibrates when sound waves hit it
A bony cartilaginous structure that surrounds and protects the brain of chordates is a
A. cranium. B. notochord. C. amnion. D. vertebra. E. jaw.
The ________ mechanism explains the movement of water and minerals through xylem
A) cohesion-tension B) pressure-flow C) bulk-flow D) assisted diffusion E) translocation