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The sodium-potassium pump maintains the resting potential of a neuron.

Endosymbiosis. how a double membrane may have been created during the symbiotic origin of mitochondria or chloroplasts

A movable, or synovial, joint is protected and cushioned by cartilage and synovial fluid.

Do not spit, nausea and vomiting, spit, nausea and vomiting is prohibited, spit, nausea and vomiting is restricted

Ancient traditional bullock cart in Asia

At a synapse, neurotransmitters are released by the axon terminal. They bind with receptors on the other cell.

coronary artery bypass surgery, and colloquially heart bypass or bypass surgery

A non-steroid hormone binds with a receptor on the plasma membrane of a target cell. Then, a secondary messenger affects cell processes.

ELECTRIC MEASUREMENT,the ideal ammeter A registers 2A. Assuming XY to be a resistance, find its value. Assuming XY to be a battery that is being charged, find its emf

The variation with time t of the magnetic flux density B in coil Y

Threshold voltage. In the reverse biasing very weak current flows due to the minority carriers, As we go on increasing the reverse biasing

TRANSISTOR AS AN OSCILLATOR, When key K is closed, current thru the coil L' increases from zero to max. When increasing current flows thru coil L', increasing magnetic field is produced by it

Hard disk structure diagram

Structure of the crista

Industrial Crowbar Tool

Do not use vacuum cleaner, vacuum cleaner is prohibited, vacuum cleaner is restricted

Do not use sunbed, sunbed is prohibited, sunbed is restricted

The water molecule is very polar, with ends that exhibit partial positive and negative charges. Opposite charges attract, forming weak linkages called hydrogen bonds

The systemic circulation carries blood between the heart and body

Lasmodesmata: Plant cells can communicate through specialized openings in their cell walls, called plasmodesmata, and the cytoplasms of adjoining cells are connected

Innervation of Skeletal Muscle, Your brain signal goes through your nervous system to your muscle

If the system is given an acceleration, find the forces on the sphere, assuming no friction

A bead slides on a long bar with constant speed v0 relative to the bar. From Fig. 6-15, v0 = r, where r is the distance of the bead from the axle through the end of the bar.

An automobile moves around a curve of radius 300m at a constant speed of 60m/s. (a) Calculate the resultant change in velocity (magnitude and direction) when the car goes around the arc of 60°

A boy on a bicycle pedals around a circle of 22m radius at a speed of 10m/s. The combined mass of the boy and the bicycle is 80kg. Find the centripetal force exerted by the pavement on the bicycle

The projectile is fired with an initial velocity v0 = 35m/s at an angle θ = 23°. The truck is moving along X with a constant speed of 15m/s. At the instant the projectile is fired

An α particles from a bit of radioactive material enter through slit S into the space between two large parallel metal plates, A and B, connected to a source of voltage

In the pulley system, The movable pulleys A, B, C are of mass 1kg each. D and E are fixed pulleys. The strings are vertical and inextensible

The inclined plane has an acceleration a to the right. Show that the block will slide on the plane if a >g tan (θ–α), where μs = tan θ is the coefficient of static friction for the contacting surfaces

A rectangular block of mass m sits on top of another similar block, which in turn sits on a flat table. The maximum possible frictional force of one block on the other is 2.0mN

How much force does it take to give a 20 000-kg locomotive an acceleration of 1.5 m/s2 on a level track with a coefficient of rolling friction of 0.03

For the coordinate system, y = υ0t + 1/2at. But at the edge of the roof y =0, and thus 0=20t1 + 1/2(-9.8)t21 from which t, =0, indicating the instant at which the ball is released, and also t1 =4.08s