The regulation of sodium ________
A) involves hypothalamic osmoreceptor detection of ion concentration
B) is due to specific sodium receptors in the hypothalamus
C) is linked to blood pressure
D) involves aldosterone, a hormone that increases sodium excretion in the kidneys
C
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The triplet codes in DNA needed to specify a specific polypeptide chain are found in the:
A) gene. B) anticodon of tRNA. C) cytoplasm. D) codon of mRNA.
Judd has a fractured coxal bone, which means he has a broken
A. arm. B. wrist. C. knee. D. pelvis. E. ankle.
Because a solution of lower solute concentration has a higher concentration of water, it exerts a lower osmotic pressure than does a solution with a higher solute concentration
Indicate whether the statement is true or false
What is a main difference between the modes of action of peptide hormones and steroid hormones?
A. Peptide hormones bind to intracellular receptors, whereas steroid hormones bind to receptors on the cell surface. B. Peptide hormones act as second messengers, whereas steroid hormones bind to receptors in the cytosol. C. Peptide hormones bind to receptors on the cell surface, whereas steroid hormones act as second messengers. D. Peptide hormones bind to receptors on the cell surface, whereas steroid hormones bind to intracellular receptors. E. There are no differences; both act by binding to intracellular receptors.