The amount of keratin protein produced during keratinization determines hair color.
Answer the following statement true (T) or false (F)
False
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Where are the anterior and posterior communicating arteries found?
A. The neck B. The cerebral arterial circle (circle of Willis) C. The branches of the celiac trunk D. The forearm E. The azygos-hemiazygos system
The respiratory center of the brain is located in the:
A. medulla. B. cerebrum. C. cerebellum. D. hypothalamus.
Tubular reabsorption and tubular secretion differ in that
A. tubular secretion is a passive process; tubular reabsorption uses active transport. B. tubular secretion adds materials to the filtrate; tubular reabsorption removes materials from the filtrate. C. tubular reabsorption increases urine volume; tubular secretion decreases urine volume. D. tubular reabsorption occurs in Bowman's capsule; tubular secretion occurs in the peritubular capillary. E. tubular secretion moves materials from the filtrate into the blood; tubular reabsorption moves materials from the blood into the filtrate.
Describe the difference between a vesicular and a nonvesicular synapse?
What will be an ideal response?