AP PSYCHOLOGY

Detailed explanation-1: -The motor neurons release a chemical, which is picked up by the muscle fibre. This tells the muscle fibre to contract, which makes the muscles move. Neurons carry messages from the brain via the spinal cord. These messages are carried to the muscles which tell the muscle fibre to contract, which makes the muscles move.

Detailed explanation-2: -Muscles are attached to bones through tendinous tissue and can generate movement around a joint when they contract. The central nervous system controls these movements through the spinal motor neurons, which serve as the final common pathway to the muscles (1).

Detailed explanation-3: -The place where a neuron makes contact with an individual muscle fiber is called a neuromuscular junction. The neuromuscular junction is basically a synapse: the neuron releases a neurotransmitter called acetylcholine (ACh) which binds to receptors on the sarcolemma (the cell wall of the muscle fiber).

Detailed explanation-4: -Your nervous system uses specialized cells called neurons to send signals, or messages, all over your body. These electrical signals travel between your brain, skin, organs, glands and muscles. The messages help you move your limbs and feel sensations, such as pain.

Detailed explanation-5: -When our body temperature decreases, sensory neurons send this information to the brain. The brain processes this and communicates with the muscular system using motor neurons. This causes the skeletal muscles to contract through shivering, which generates heat and restores our body temperature.