Cell Biology Answers

Is the interintegumentary system composed of loose connective tissue?

if a drug partly blocked a membrane potassium channels, how does it affect the action potential? free answers

The ________ controls when the gene is transcribed by RNA polymerase. 

In class we are studying action potentials, repolarization, hyperpolarization, etc.

My teacher told us how once a certain membrane potential is reached and the action potential is fired, potassium channels open and potassium ions flood out of the axon, making it more negative and helping it reach resting potential again. My teacher said that the protein has to be "pumped" out using ATP because it is moving against the concentration gradient. However, looking online it seems like the potassium passes through voltage-gated potassium channels along/following the concentration gradient and therefore doesn't require energy. So does the potassium exiting the cell in repolarization require ATP or no? Does the potassium go through a "pump" or just voltage-gated ion channels?

 The composition of PBS is 0.137M NaCl, 0.012M Phosphate, 0.0027M KCl, pH 7.4.

 Combine the following:

·        80g NaCl

·        2g KCl

·        14.4g Na₂HPO₄ (dibasic anhydrous)

·        2.4g KH₂PO₄ (monobasic anhydrous)

·        800mL distilled H₂O

1.     Adjust pH to 7.4 with HCl

2.     Add H₂O to 1L

3.     Autoclave for 20 minutes on liquid cycle. Store at room temperature.

Which ions are being produced by this process,

which of these is not a part of muriene a)polypeptides b)aminoacids c) amino acids

Describe how do plants get carbon in form of CO2 from the air

Why is the concentration of urea higher in the urine than in the filtrate?

The processes that result in the glucose concentrations?

When a nerve impulse passes from one neuron to another, it causes the release of neurotransmitter from versicles a fused to the membrane of the synaptic knob. Neurotransmitter is released into the synaptic  cleft and then binds to receptor on the ion  channel. How does this lead to setting up an action potential in the next neuron?

The immune systems Primary role is to defend against pathogens. For this to be affective the immune system must be able to recognise cells that belong to the body and cells that do not.

What is the mechanism that the immune system uses to distinguish between body cells and potential pathogens? 

why is this mechanism means that patients who receive and organ donation require immune suppression drugs?

Why is the concentration of urea higher in the urine than in the filtrate?

The processes that result in the glucose concentrations?

When a nerve impulse passes from one neuron to another, it causes the release of neurotransmitter from versicles a fused to the membrane of the synaptic knob. Neurotransmitter is released into the synaptic  cleft and then binds to receptor on the ion  channel. How does this lead to setting up an action potential in the next neuron?

The immune systems Primary role is to defend against pathogens. For this to be affective the immune system must be able to recognise cells that belong to the body and cells that do not.

What is the mechanism that the immune system uses to distinguish between body cells and potential pathogens? 

why is this mechanism means that patients who receive and organ donation require immune suppression drugs?