Answer:
B. Leaves provide a place for photosynthesis to occur.
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<u>hope it helps..</u>
<u>have a great day!!</u>
A) positive ion and a negative ion
Answer:
It means you can feel the heat from the other person's hand.
Explanation:
Hello!
Chemical reactions require energy to begin. The reactants must collide with enough energy for bonds to change. This energy is known as activation energy - the difference in energy between that of the reactants and the amount needed for the reaction to occur.
Catalysts lower the activation energy needed for a chemical reaction to occur, therefore also increasing the rate of a reaction. Enzymes are proteins which act as catalysts within cells.
Therefore, enzymes cause the activation energy to lower.
Hope this helps!
Answer:
A. The brain could not monitor the expansion and relaxation of the aorta.
Explanation:
Baroreceptors are sensors present in the aortic arch and in the carotid sinus which are responsible to sense the blood pressure and brain the communicate this information to central nervous system for maintaining the blood pressure.
When baroreceptors stopped working or uring baroreceptor dysfunction, the blood pressure increases but returns to normal after an hour. In baroreceptor dysfunction, brain will be unable to monitor the expansion and relaxation of the aorta and results in the increase blood pressure. Soon the baroreflex occurs and helps in returning the pressure toward a normal level.
Hence, the correct option is A.
