Im not entirely sure about this but I would guess A
The body has mechanisms which alter and/or Maintain blood pressure and blood flow
Among the gases mentioned if the list of options, nitrogen, oxygen,
methane and water vapor, water vapor has the greatest effect on the
weather conditions. The reason is that the humidity of the gases can
change considerable and given that H2O molecules will replace (or be
replace by) N2 and O2 molecules, and due to the difference in the molar
masses of H2O and the other two gases, the molar mass of the mixture
(air) will change considerably and this will cause changes in the
atmosphere pressure.
Answer:
Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as by holding a heavy book or a dumbbell at the same position. The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state.
Explanation:
Answer : A, B , C
Explanation: the second option
