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3 friends want to go camping and they pack enough water to last for 6 days. Just as they are about to leave they are joined by 3 more people. How long will their water last now?
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Answer:
a) avoiding all dairy products containing lactose.
b) taking lactase enzyme tablets when consuming lactose products
e) taking lactase enzyme tablets or avoiding all dairy products
Explanation:
When a baby become 2 to 5 year old the production of most of the lactase stops so the undigested lactose gets into the colon where it acts as substrate for the lactic acid bacteria which produce lactic acid, CO2 and cause painful gas, bloating, nausea, diarrhea, etc.
So for avoiding this problem, lactose-containing dairy products should be avoided by lactose intolerant person or they can take lactase enzymes containing tablets after consuming lactose products because the lactose will be digested by the lactase enzyme which is present in the tablet and no lactose will be remained for lactose fermenting bacteria.
Answer:
1. The presynaptic neuron reaches the synaptic knob and the terminal is depolarized.
2. The electrical voltage gated calcium channels in the presynaptic knob opens.
3. The calcium ions enters through the calcium channel, this calcium ions cause the fusion of the synaptic vesicles to the presynaptic membrane, the cell membrane of an axon terminal that faces the receiving cell.
4. There is neurotransmitter release by the axon terminal of a neuron and bind to and react with the receptors on the dendrites of another neuron e.g. acetylcholine by exocytosis.
5. Acetylcholine diffuses across the synaptic cleft and bind to receptors on the postsynaptic neuron, that is a neuron to the cell body or dendrite of which an electrical impulse is transmitted across a synaptic cleft by the release of a chemical neurotransmitter from the axon terminal of a presynaptic neuron.
6. This causes sodium ion channels in the postsynaptic neuron to open, and sodium ions diffuse in.
7. Excitatory (excited neurons) postsynaptic potentials are created, and if these generator potentials are sufficient then the postsynaptic terminal reaches threshold potential and there is propagation.
Explanation: The nervous system is made up of billions of specialized cells called neurons, it is crucial to have an efficient communication between neurons for normal functioning of the central and peripheral nervous systems. The presynaptic action potential refers to an action potential of neuron before synapse. The above is the sequence of event during the transmission of information across the synaptic cleft
- Kaibab Squirrel gives us one nice example of the evolution that is caused by geographical isolation - about 10,000 years ago when the last Ice Age ended, physical formations in the valley changed in a way that prevented squirrels from reaching the Colorado River. The valley has become a geographical barrier separating forests and squirrels on each edge. One group of squirrels became two separate groups that were no longer able to mate, kaibab squirrels. Abert squirrels are North American species, found across a group of locations. Kaibab squirrels are a subspecies of Abert squirrels, found only in one region in the United States. - Kaibab and Abert squirrel live in ponderosa pine forests, where they build nests of twigs and pine needles. They eat nuts, fruits, and fungi, as well as seeds, bark and twigs from the trees they make at home. The most important source of food in the squirrel Kaibab is the seeds contained in the cones of ponderosa
Answer:
ATP contains a large amount of energy because it has high-energy phosphate bonds.
Explanation:
ATP is an unstable molecule which hydrolyzes when it react with water to form ADP (adenosine diphosphate) and inorganic phosphate. The large amount of energy of ATP comes from the two high-energy phosphate bonds