Receptors, Sensations and Perception: Sensory receptors detect changes in the environment and stimulate neurons to send nerve impulses to the brain. Sensory receptors are one of two categories: or .

general or special

Explanation:

Sensory receptors are usually neurons cells that detect and react to physical or chemical stimuli. The sensory receptors are the starting point of information flow in nervous system. The receive a stimuli and convert to electric impulse. According to their function the sensory receptors may be divided into following categories.

General receptors are those which are not specified to specific organ and found in various organs and produce a general sense. such as mechanoreceptors which are found in wall of blood, skin and muscles. Somatosensation is considered as general sense that detect the touch, vibration, temperature etc.

Special receptors are those which are found in specific organ and contribute to specific sense such as baroreceptors found in blood vessels and photoreceptors that are majorly found in eye.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

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