The relationship of blood flow (Q), resistance (R), and pressure (P) in a vessel can be expressed by which equation?
A. Q = P/R.
B. Q = R/P.
C. Q = PQ.
D. P = Q/ R
Answer:
A. Q = P/R.
Explanation:
Resistance is the force that counteracts the blood flow and slows down the speed of the blood flow. It occurs due to friction between blood and the walls of blood vessels. Resistance is regulated by the size of the blood vessels, length of the blood vessels and viscosity. Blood always flows from the region of the higher blood pressure towards the lower one. Therefore, blood flow is directly proportional to pressure and is indirectly proportional to the resistance.
So, Q= P/R
Match the day and time of the year and location
The stars that we see on the sky change with the station of the year, they change their position depending of the day of the year and the location, mainly the latitude since on that depends what "side" of the earth the sky is facing towards, at certain points the north hemisphere sees a different sky than the south, but the east and west as long as they are in the same latitude do see the same sky.
Answer:
An oncogene is a gene that promotes cell division. Normal cells divide according to the cell cycle, a controlled process that coordinates cell growth and multiplication in living tissue. After a cell divides, it enters the interphase stage during which it can either prepare for a new division or stop dividing.
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Explanation: