True. Fat is the nutrient with the highest concentration of energy, providing approximately 9 calories per gram, compared to carbohydrates and proteins, which each provide about 4 calories per gram. This high energy density makes fat an important source of fuel for the body, especially during prolonged physical activity.
that is false
Yes, energy is required to move molecules from a high concentration to a low concentration. This process is known as passive transport and it relies on the kinetic energy of the molecules themselves to move across the concentration gradient.
False. Diffusion is a passive process that does not require energy input from the cell. Substances move down their concentration gradient from an area of high concentration to an area of low concentration. The cell membrane facilitates this movement without the need for energy.
True. At the highest point of the swing, the potential energy is at its maximum as it has the greatest height above the ground, which gives it the highest potential to do work.
no
False. Diffusion and osmosis are both types of passive transport, where molecules move from an area of higher concentration to an area of lower concentration without the need for energy input.
No, the energy of a photon is directly related to its frequency, not its period. Photons with the highest energy have the shortest wavelength and the highest frequency. Period is the time taken to complete one full cycle of a wave, and it is inversely related to frequency.
False
Passive transport does not require the cell to expend energy in the form of ATP. It relies on the natural movement of molecules from an area of high concentration to low concentration, driven by the concentration gradient. Examples include simple diffusion, facilitated diffusion, and osmosis.
If your urine is too diluted, the test may show a false -. It's best to test with your first morning urine to ensure it is at it's highest concentration.
True. External respiration refers to the process where oxygen is taken up from the environment and used to break down nutrient molecules, such as glucose, to release energy in the form of ATP through cellular respiration.
Absorbance rises with concentration because there is more material for a given frequency of light to be absorbed in. Your statement is false.