A young couple desires to start a family later, but they currently rely on the rhythm method and are uncomfortable with the thought of hormonal contraceptives. What additional form of birth control would you advise them to use?
What will be an ideal response?
Statistically twhe rhythm method has a failure rate of 25%. That is, pregnancy results in 25 out of 100 instances. At minimum, the couple could combine the rhythm method with using condoms. Alternatively, vaginal barriers and intrauterine devices also do not rely on hormones and have a comparatively low failure rate of 5-6%.
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A biomarker is
A) any chemical in the body. B) a gene that encodes a particular protein. C) always a protein. D) a body chemical associated with a particular disease or exposure to a toxin.
List the two classes of sympathetic receptors and the neurotransmitter(s) each binds
What will be an ideal response?
External respiration involves the
A) movement of air into and out of the lungs. B) diffusion of gases between the alveoli and the circulating blood. C) exchange of dissolved gases between the blood and the interstitial fluid. D) binding of oxygen by hemoglobin. E) utilization of oxygen by tissues to support metabolism.
The lower the pH, the greater the number of hydrogen ions released by a chemical into solution
Indicate whether the statement is true or false