Which of the following correctly states how a gustatory receptor will be stimulated by an acidic or sour compound?
A) G proteins will be activated.
B) Hydrogen ions will diffuse into the receptor cell causing depolarization.
C) Sodium ions will diffuse into the receptor cell causing depolarization.
D) Second messengers will be activated.
E) Adenylate cyclase will be activated.
C
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Which of the following is NOT an explanation for how one gene can produce more than one protein?
A. Posttranslational methylation and phosphorylation B. Different carbohydrates bonded to the protein C. Various cuts and splices of mRNA D. Different groups of polypeptides associating to make different proteins
An example of a bone formed by intramembranous ossification is the:
a. sphenoid b. rib c. clavicle d. sternum
Which of the following is an irregular bone?
A. radius B. rib C. femur D. vertebrae
The central (Haversian) canal that runs through the core of each osteon is the site of ________
A) blood vessels and nerve fibers B) yellow marrow and spicules C) cartilage and interstitial lamellae D) adipose tissue and nerve fibers