Approximately what percent of the oxygen in blood is transported by the hemoglobin of erythrocytes?
A. 33%
B. 50%
C. 66%
D. 75%
E. 98%
E
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The temporomandibular joint is
A) the suture between the temporal and maxillary bones. B) the site of the articulation between the cranium and mandible. C) the first suture to be completely ossified in the adult skull. D) the location of the insertion of the temporalis muscle. E) None of the answers are correct.
In a feedback loop, the integrating center sends information to the ________.
A. brain region B. effector C. thermostat D. sensor
Ejaculation is controlled by a reflex arc that involves several nerves and neurotransmitters. The final neurotransmitter in this arc that directly stimulates the contraction of the muscularis of the male tract is:
A. acetylcholine B. nitric oxide C. oxytocin D. norepinephrine E. somatostatin
Which of the following is not a type of fibrous connective tissue?
A. Hyaline cartilage B. Reticular tissue C. Areolar tissue D. Dense regular connective tissue E. Dense irregular connective tissue