mRNA is needed to synthesize ________ in the cytoplasm
A) carbohydrates
B) lipids
C) proteins
D) phospholipids
E) salts
C
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Following hemorrhage, vasopressin secretion increases because of increased firing of hypothalamic osmoreceptors.
Answer the following statement true (T) or false (F)
The normal level at which a physiological variable is maintainied is known as its
A. stimulus.?B. control center.?C. negative feedback.?D. set point.?E. effector.
Chromatin that is active in genetic transcription is called ________.
A. homochromatic B. embryonic chromatin C. heterochromatin D. euchromatin
Which of the following statements concerning control of blood flow through arterioles is TRUE?
A. Beta-adrenergic receptors are more abundant on most arteriolar smooth muscle than are alpha-adrenergic receptors. B. Binding of epinephrine to alpha-adrenergic receptors causes vasodilation. C. Increased stimulation of vascular smooth muscle by the parasympathetic nervous system causes increased vasoconstriction. D. If the arterial blood pressure to an organ suddenly decreases, arterioles in the organ will dilate in response. E. Body-wide constriction of arterioles results in a decrease in the total peripheral resistance (TPR).