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What is Passive Transport?
Passive Transport: Specialized proteins called permeases also move specific substances across the cell membrane in a process called carrier transport. If these molecules function without requiring chemical energy, the passive transport is called facilitated diffusion. Substances cross the cell membrane in the same direction as they would by diffusion.
Another passive transport mechanism consists of gated channels, proteins that allow certain substances to cross the cell membrane, either permanently or following a chemical or electrical stimulus. An example of passive transport: glucose enters red blood cells about 100 times faster than would be expected from simple diffusion. This process apparently does not require energy.
Abrasive action of water, ice and wind Water is an important mechanical weathering agent both in liquid as well as in the frozen state. Rain water carrying sediments, ice glac
It is said during puberty rising sex hormones stimulate osteoblasts to produce bone faster than the rate at which epiphyseal cartilage expands. The timing of epiphyseal closure dif
Intracellular sodium concentration of the motor neuron A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy.
Q. Do all mammals have a placenta? Mammals of the monotreme group (platypus, echidnas) are oviparous egg- laying and they don't have a placenta. Mammals of the marsupial group
Q. List principles to keep in mind for designing the messages? o Develop a positive theme. Approaches are more effective when they promote positive messages that state clear
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Define Role in Glucose, Lipid and Nucleic Acid Metabolism? Chromium leads to a decrease in blood glucose concentration in people with elevated glucose levels and an increase in
Which level of a gene, such as the ADH gene and its encoded product should have the highest homology among different species? Explain your answer. A. The genomic DNA sequences o
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