Answer:
a,c and d
Explanation:
- brain becomes smaller and lighter with age and although in absence of disease, it retains its structure and function.
- the brain shrinks, it pulls away from from the skull and the amount of amount of space between brain and skull doubles between 20 to 70 years of age.
- Blood flow reduces within the brain , which also uses less oxygen and glucose.
Hence, options a, c and d are correct.
Answer:
Energy
Explanation:
In the perspective of common people , almost all changes that we make need some sort of energy in order for it to happen. Even the simple ones.
(For example, When you want to turn on the lamp, you need to spend energy to push your finger down and press the switch. When you wants to change your bed covers, you need to spend energy to walk down to the cabinet , take out the bed covers, and spend another energy during the removal and set up of the bed cover.)
Energy can be expressed using or Newton* meter as units, mean that you do a certain amount of work(Newton) over a distance (meter) and The ability to conserve or energy like food will be expressed as Joule(J).
Answer:
Why do we need active transport?
Moving Against a Gradient
Small substances constantly pass through plasma membranes. Active transport maintains concentrations of ions and other substances that living cells require in the face of these passive movements. A cell may spend much of its metabolic energy supply maintaining these processes.
Explanation:
Hope That helped
The mass is increased as two things are added together so the two masses of the two substances are added together.
Answer:
The maintenance of the body's physiology is important for the living organisms.The metabolism of the human body affects with the temperature, altitude and with the other external and internal conditions of the body.
In case of higher altitudes, the partial pressure of the oxygen is low. This causes the increase in the breathing rates so the oxygen amount in the body can be increased. The dehydration of the body may also occur for the few hours as the individual reaches the altitude. The body's metabolism also increased with the increase in the altitude.
