The temperature control center within the anterior region of the hypothalamus is activated by ____ and initiates reflexes that mediate ____
a. cold, heat production and heat conservation.
b. cold, heat loss.
c. warmth, heat loss.
d. warmth, heat production and heat conservation.
e. warmth, vasoconstriction.
C
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A researcher has been studying genes that result in abnormal cell growth and has linked them to cancer. What two types of genes is the researcher studying?
A. Metastatic activators and apoptosis stimulators B. Kinases and cyclins C. Tumor suppressors and oncogenes D. Oncosuppressors and tumor activators
Steroid hormones are lipids, derived from
A. cholesterol. B. glycerol. C. amines. D. polypeptides. E. nucleic acids.
What kind of bond is formed when two atoms share electrons?
a. ionic b. covalent c. hydrogen d. isotopic
The axial skeleton is composed of:
A. all skeletal structures below the pelvis. B. the skull, face, thoracic cage, and vertebral column. C. the upper and lower extremities. D. the ribs, pelvic girdle, and upper and lower extremities.