1)which of the following describes how infectious agents in the environment would most likely affect one’s personal health?

a) exposure would first cause a cell-mediated immune response from the body.

b) infectious agents would trigger nonspecific external defenses such as sweat, saliva, and mucus.

c) exposure would weaken the body’s immune system and leave it unable to fight future infections.

d) infectious agents would invade the body and leave it unable to produce antibodies.

2)heres the other one too: d this is the last one: vitamin c is a water-soluble vitamin and can sometimes be found in the urine. what does this suggest about how the body deals with vitamin c?

a) vitamin c continues to circulate in the blood so it is available as cells need it.

b) excess amounts move through the wall of the bladder and re-enter the bloodstream.

c) excess amounts are removed by the kidneys and excreted along with urine.

d) vitamin c can be stored in fat cells surrounding the kidneys until it is needed.

Whose work is most likely to be part-time and at several locations? а. physical therapistb. sports physicianc nutritionistd group fitness instructor

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.

Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak