Answer:
is this a real problem cant complete the punnett with less info
Answer:
The sodium channel have refractory period.
Explanation:
Action potential are generated at axon hillock of neuron and travel across the neuron in response to stimuli. For the the generation of action potential the steps are stimulus, depolarization, repolarization, hyperpolarization and resting state.
So the first step for action potential after stimulus is depolarization. Depolarization requires the opening of sodium channels to make the inside of neuronal membrane positive. These sodium channels have refractory period. They cannot open immediately after activation. So the sodium channels of one direction in neuron (upstream) become refractory and it is convenent to open the sodium channels of other direction (downstream) of neuron. That why action potential is transmitted in one direction.
It is like the gunpowder placed at a line the fire cannot go back in burnt gun powder direction.
Answer:
True. It should false but some people are just really stupid and mix those kinds of things up, but it is true because cookbooks kind of look similar to scientific investigations because of the layout and the writing style but all cookbooks and scientific investigations are all different.
From the information given, the leg of the triangle measures 3 cm and the other leg measures 6 cm. The length of the hypotenuse is unknown.
Let the hypotenuse be c
Let one leg of the triangle be a
Let the other leg of the triangle be b
We use the formula : c² = a² + b²
c² = 3² + 6²
c² = 9 + 36
c² = 45
c = √45
c = 6.70
Therefore, the length of the hypotenuse is 6.7 cm
Answer:
They are stimulated by an antigen.
Explanation:
Natural killer cells are cytotoxic cells that help our body in innate immune response. These are an critical and important component of the innate immune system of our body. These natural killer cells provide a rapid response towards the virus infected cells. These cells have capability to detect MHC that are present on the infected cells. Natural killer cells do not require activation for killing those cells which are missing MHC I. Due to this feature, they are named as the Natural killer cells. These cells can directly induce the death of tumor cells and play an important role in immunosurveillance.