What physiological processes occur in response to an increase in blood pressure? What will be an ideal response?Concepts to Consider: Baroreceptors in the walls of the arteries and heart are sensitive to blood
pressure changes. Increases in blood pressure stretch baroreceptors; message is sent to medulla;
cardiac center of brain stimulates parasympathetic nerves that slow the heart down; pressure is
lowered. Also, vasomotor center of brain inhibits sympathetic nerves that cause vasodilation, so
pressure is lowered
Concepts to Consider: Baroreceptors in the walls of the arteries and heart are sensitive to blood
pressure changes. Increases in blood pressure stretch baroreceptors; message is sent to medulla;
cardiac center of brain stimulates parasympathetic nerves that slow the heart down; pressure is
lowered. Also, vasomotor center of brain inhibits sympathetic nerves that cause vasodilation, so
pressure is lowered
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To prevent Clostridium infections in a hospital setting, what kind of disinfectant should be used?
A) fungicidal B) pseudomonicidal C) sporicidal D) tuberculocidal
Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few
inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006 . What element does an atom of 210Po change into after it emits an alpha particle? What will be an ideal response?
Which of the following statements best describes the structure of a hemoglobin molecule?
A. Hemoglobin is comprised of three globin molecules and one heme group per hemoglobin molecule. B. Hemoglobin is comprised of four globin molecules, each with their own heme group that binds to and carries oxygen. C. Hemoglobin is comprised of four globin molecules, each of which contain millions of heme groups. D. Hemoglobin is comprised of two globin molecules, both with their own heme group that binds to and carries oxygen.
What kingdoms composed the three kingdom classification system used by scientists in the late 1800s?
a. animals, plants, fungi b. animals, plants, bacteria c. animals, fungi, protists d. animals, plants, protists