Explain the polar character of an ammonia molecule (NH3). What is the cause of the partial charges? What is the overall charge for NH3?
What will be an ideal response?
When chemically bonded with each other, the nitrogen atom is partially negative whereas the hydrogen atoms are partially positive. The nitrogen atom in a molecule of ammonia has a stronger attraction for the electrons participating in the covalent bonds than the hydrogen atoms. The net charge on the molecule is still zero, however.
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What structure in the fetus allows blood to directly flow from the right atrium to the left atrium?
A) Ductus venosus B) Ductus arteriosus C) Foramen ovale D) Foramen rotundum
Hot chili peppers contain a chemical compound called capsaicin that stimulate which type of receptor?
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The extensor ________ is a connective tissue band that holds down extensor tendons on the posterior side of the wrist.
Fill in the blank(s) with the appropriate word(s).
The target tissue for luteinizing hormone is the
A) liver B) kidneys C) pancreas D) thyroid gland E) gonads