Some of the most common buffers in animal cells are effective because
A) They have a pK value that is close to the normal pH of the cell.
B) They can bind with H+ in a chemical reaction, forming a new product that can be eliminated from the body.
C) They have very low pK values.
D) Both A and B
Answer: D
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These events occur during the development of the nervous system: a: Neural groove formsb: Neural folds approach one anotherc: Neural crest cells pinch off from the neural foldsd: Neural folds fuse to form neural tubeWhich is the correct chronological order for the events?
A. b a, d, c B. c a, b, d C. c, b, d, a D. a, c, b, d E. a, b, c, d
____________ promotes the development of secondary sex characteristics in males
Fill in the blank(s) with correct word
List the layers of the meningeal membranes surrounding the brain and spinal cord from most superficial to deepest: 1. Pia mater 2. Arachnoid mater 3. Dura mater
A) 3, 2, 1 B) 1, 2, 3 C) 1, 3, 2 D) 3, 1, 2 E) 2, 3, 1
A fast-adapting mechanoreceptor in the papillary layer of the dermis that responds to fine touch is a
A) tactile (Merkel) disc. B) root hair plexus. C) free nerve ending. D) Ruffini corpuscle. E) tactile (Meissner) corpuscle.