MICROANATOMY

Detailed explanation-1: -Sensory neurons carry nerve impulses from sense organs and internal organs to the central nervous system.

Detailed explanation-2: -Sensory neurons bring signals into the CNS, and motor neurons carry signals out of the CNS.

Detailed explanation-3: -When a danger signal occurs, like when you step on a nail, there is increased neural input to the spinal cord and brain alerting you to take action. This “firing level” is the threshold amount of neural input the brain needs to take action.

Detailed explanation-4: -If you touch a hot stove, sensory receptors in your fingertip sense the dangerous heat and convert this stimulus into an electrical signal. This signal leaves your fingertip via nerve cells called sensory neurons.

Detailed explanation-5: -For example, if you step on something sharp, the nerves in your foot send a pain signal up your spinal cord to your brain. When your brain recognizes the danger, it sends another signal down your spinal cord to the nerves in your leg and foot muscles, telling them to pull away from the object.