Pepsinogen is an
A. active enzyme that is released in the small intestine and digests carbohydrates.
B. inactive precursor to the enzyme pepsin that digests proteins in the stomach.
C. active enzyme that digests proteins within the small intestine.
D. inactive precursor to a nonspecific enzyme that is synthesized in the pancreas and released in the small intestine.
B
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Ribosomes are composed of protein and
A) glycogen. B) rRNA. C) ATP. D) DNA. E) steroids.
The receptors responsible for detecting deep pressure and high-frequency vibration are
A. Krause bulbs. B. lamellated corpuscles. C. arrector pili corpuscles. D. Ruffini corpuscles. E. tactile corpuscles.
Some species of birds have a distinctive mode of courtship called "lekking." Males of lekking species assemble in groups (leks) and display. Females come to the leks and observe the displays by the males
Eventually a female selects a male and mates with him. What is the fundamental difference between this situation and the formation of territories by males that call from their territories to attract females? (Hint: What does a female base her choice on in each situation?)
The cell bodies of first order somatosensory neurons are found in the:
a. olive b. red nucleus c. dorsal root ganglia d. collateral ganglia