__________ are not self-sustaining cellular entities -- they consist only of nucleic acids enclosed by a protein __________
Fill in the blank(s) with correct word
viruses; coat
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The use of the term "origin" to describe a muscle attachment that doesn't move during contraction is misleading.
Answer the following statement true (T) or false (F)
Blocking ?2-adrenergic receptors prevents airway ________.
A. dilation B. constriction
When body temperature decreases below the normal range, thermoreceptors in the skin and hypothalamus detect the decrease in body temperature. The heat-promoting center of the hypothalamus is activated, which sends signals to blood vessels and skeletal muscles. In response, blood vessels in the skin constrict and skeletal muscles shiver. Determine the part of this negative feedback loop that serves as the control center.
A) hypothalamus B) thermoreceptors C) blood vessels and skeletal muscles D) body temperature
________ is the main form in which Carbon dioxide is carried in the blood
A- Carbonic anhydrase B- Carbonic acid C- Carbon dioxide D- Bicarbonate ion