3 Mixed seromucous salivary glands, structure of glandular acini The three large glands have a different composition in the type of secretory units is concerned: - The parotid glands (which represent 25% of the production of saliva) are formed by serous production units and they are compound acinar type.
How Anti-Lock Brakes Work. An anti-lock brake system (ABS) is a braking system that is made to allow a vehicle to maintain traction with the road when braking. Braking is controlled by driver input via the brake pedal, and older braking systems response to a driver braking suddenly or with intense pressure was sometimes to lock up or skid.
PARKING BRAKE. An e-brake - also known as the emergency brake, hand brake or parking brake - is attached to a cable that is directly connected to the brake system. When you engage the e-brake, the cable is immediately pulled and the e-brake is activated. The e-brake is used to keep your vehicle stationary when parked and in emergency stopping situations.