Hormones are usually released in large quantities into the blood stream.
a. true
b. false

False

Explanation:

In endocrine glands, hormones are produced in small quantities and are secreted into the bloodstream. The rate of secretion varies with the body's need. When they meet the target tissues, chemical changes begin, but they need to be recognized by cell membrane receptor proteins or the cytoplasm.

The effect of hormones on tissues depends on the amount of the hormone and the responsiveness of the tissue. They trigger and initiate biochemical reactions and their effects may remain even after levels of these hormones have decreased in circulation.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.