Biology, 26.02.2020 02:43 kaitlynmoore42
If a person has lost a significant amount of blood but still maintains a normal blood pressure it does not necessarily mean that the person is maintaining adequate perfusion. Which of the following best explains why this is so?
a. Blood vessels are constricting causing greater peripheral resistance.
b. The heart has increased its rate to increase cardiac output.
c. The sympathetic nervous system has increased its nerve impulses.
d. The heart has increased its contractile force increasing cardiac output.
Answers: 2
Biology, 22.06.2019 00:40
Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism
Answers: 2
Biology, 22.06.2019 09:00
Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel
Answers: 3
Biology, 22.06.2019 10:30
Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.
Answers: 3
Biology, 22.06.2019 12:30
How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?
Answers: 1
If a person has lost a significant amount of blood but still maintains a normal blood pressure it do...
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