Do covalent substances ionize while dissolving?<br><br> yes<br> no<br> sometimes

When neurotransmitter molecules bind to receptors in the plasma membrane of the receiving neuron

Maru [420]

Answer:

Ion channels in the plasma membrane of the receiving neuron open

Explanation:

Ionotropic receptors are protein structures of the neuronal plasma membrane that function as specific ion channels for certain ions. Depending on the type of ion involved is the nature of the effect that occurs when these channel receptors open. Being ionic channels, these types of receptors participate in the rapid, exciting or inhibitory responses that neurons give.

For now we will refer only to ionotropic excitatory receptors which, by allowing the passage of ions such as sodium or calcium, produce a decrease in membrane potential (hypopolarization). This increases the probability of generating action potentials in the neuron.

To these, like other types of receptors, specific neurotransmitters are attached, which causes their activation and opening.

In addition to presenting an ionic channel in their structure, these receptors have a site where a specific neurotransmitter (binding site to the neurotransmitter) binds. But there are also sites of binding to other molecules, which without causing their opening modify, however, the effect of the neurotransmitter. That is, the receptors can be modulated by other molecules.

A typical example of an ionotropic receptor is the cholinergic receptor (its specific neurotransmitter is acetylcholine, ACh) of the nicotinic subtype found in the skeletal neuromuscular synapse. Part A of the scheme. When ACh binds to the receptor, the channel opens causing sodium ion (Na +) to enter, causing hypopolarization (or depolarization) at that point. The name of this type of receptors derives from the fact that they can be identified with nicotine, a substance that specifically binds to them.

4 0

4 years ago

g A wave pulse on a light string encounters a boundary with a heavy string. In other words, the pulse moves from a medium with a

sammy [17]

Answer:

The answer to the question is

Changing travel medium from one of low density to another of higher density (heavier weight) reduces the speed of the transmitted pulse

Explanation:

The rate of propagation of a wave in a medium is correlated to the properties of the medium. in a guitar, sound is produced by vibrating the string. The frequency of the produced sound depends on the speed and wavelength of the wave as follows

v = f × λ

The guitar strings, though having equal length, the produce sounds of different frequencies and they also have different linear mass density.

As highlighted, the speed of sound is a function function of the frequency and the frequency produced in a string is related to the linear density

The relation between speed with linear density of a material, or its mass per unit length is

v absolute = $\sqrt{\frac{F_{T} }{\mu} }$ where

v absolute = The absolute velocity

$F_{T}$ = The horizontal tension on the string

$\mu$ = Mass per unit length of the string = $\frac{m}{l}$ where

m = Mass of the string and

l = Length of the measured mass of string

There fore the wave propagates more slowly, or slows down when it changes its travel medium from one of lower linear mass density to a different medium having a higher density

The speed of the transmitted pulse reduces in the heavier string

8 0

3 years ago

A beam is said to be statically determinate if all of its unknown reaction components can be determined by the static equilibriu

BlackZzzverrR [31]

Answer:

The correct option is propped cantilever beam.

Explanation:

A propped cantilever beam along with all the reactions is shown in the attached figure.

Since we can see that the number of unknowns are 4 but the equations of statics are only 3 thus we conclude that the beam is indeterminate to 1 degree.

For all the other beams the reactions and the equations are 3 each thus making the system determinate.

4 0

4 years ago

In physics what do we use machines for

Tasya [4]

Answer:

hope it helps for you

Explanation:

A machine is an object or mechanical device that receives an input amount of work and transfers the energy to an output amount of work. For an ideal machine, the input work and output work are always the same. The six common simple machines are the lever, wheel and axle, pulley, inclined plane, wedge, and screw.

7 0

3 years ago

Please select the word from the list that best fits the definition most destructive kind of mass movement

Alborosie

There is no list but I would say a landslide.

6 0

3 years ago

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Do covalent substances ionize while dissolving? yes no sometimes