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1 year ago

Which of the following is true of ligand gated sodium ion channels neurons?

1 answer:

6 0

The true statement about ligand gated sodium ion channels in neurons are open in response to chemical messenger and hyperpolarize the membrane.

<h3>What are ligand gated sodium ion channels?</h3>

Ligand gated sodium ion channels are the channels present in the neurons. Ion moves through this channel inside the cell or outside the cell.

Thus, the correct option is a) Open in response to chemical messenger and depolarize the membrane.

Learn more about ligands

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NASA’s Tracking and Data Relay Satellite (TDRS) System constellation resides at geosynchronous orbit (35,000km) altitude. If a t

Leya [2.2K]

Answer:

35,000 km = 35,000,000 m = 3.5 E107 m

t = S / v = 3.5 * 10E7 / 3.0 E10E8 = .117 sec

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2 years ago

A copper rod has a length of 1.3 m and a cross-sectional area of 3.6 10-4 m2. One end of the rod is in contact with boiling wate

sdas [7]

To solve the problem it is necessary to apply the concepts related to heat flow,

The heat flux can be defined as

$\frac{dQ}{dt} = H = \frac{kA\Delta T}{d}$

Where,

k = Thermal conductivity

A = Area of cross-sectional area

d = Length of the rod

$\Delta T=$ Temperature difference between the ends of the rod

$k =388 W/m.\°C$ Thermal conductivity of copper rod

$A = 3.6 *10^{-4} m$ Area of cross section of rod

$\Delta T=100-0=100\°C$ Temperature difference

$d=1.3m$ length of rod

Replacing then,

$H = \frac{kA\Delta T}{d}$

$H = \frac{(388)(3.6 *10^{-4})(100)}{1.3}$

$H=10.7446J$

From the definition of heat flow we know that this is also equivalent

$H = \dot{m}*L$

Where,

$\dot{m} =$ Mass per second

$L = 334J/g$ Latent heat of fusion of ice

Re-arrange to find $\dot{m},$

$H = \dot{m}*L$

$\dot{m}=\frac{L}{H}$

$\dot{m}=\frac{334}{10.7446}$

$\dot{m} = 31.08g/s$

$\dot{m}= 0.032g/s$

Therefore the mass of ice per second that melts is 0.032g

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3 years ago

A 70.0Kg cyclist Rides a 15.0kg

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Answer:

$1275 kg*m/s$

Explanation:

We'll use the momentum equation:

$p=mv$

where:

p = momentum

m = mass

v = velocity

Since we're doing the magnitude of momentum of the system, we'll add the mass of the cyclist and the mountain bike together:

$70.0 kg + 15.0kg=85.0 kg$

Given that, we can now substitute our given values into the momentum equation:

$p=mv\\p=85.0kg*15.0m/s$

Our final answer is:

$p= 1275 kg*m/s$

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2 years ago

Water is poured slowly into the container until the water level has risen into tubes A, B, and C. The water doesn't overflow fro

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Answer:

dA = dB = dC

Explanation:

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3 years ago

Why does the light from the touch reach upto only certain distance

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It is also likely (but not certain) that the photons will be absorbed by atoms. ... Light particles( or photons) never”run out” or loose their energy, so they can go an infinite distance, or until it reaches an object, that reflects the light or obsorbs it. Ie, a planet, or a mirror.

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3 years ago