Question

What is the function of receptors in our body
(A). All information from the environment is detected by receptors.
(B). Receptors pass information in the form of electrical impulse to the brain.
(C). Receptors pass information in the form of mechanical impulse to the brain.
(D). Both A & B

Answer 1

Hint: Receptors are something associated with a response to different factors or external stimulus. Depending on the state of the receptor, a change is triggered within the cell. In the most literal sense, a receptor essentially works like a ‘lock and key’. There are broadly four receptors that commonly respond to different stimuli. They are the chemoreceptors, thermoreceptors, photoreceptors and mechanoreceptors.

Complete answer:
A receptor is an organ or cell which is used to respond to heat, light or other external stimulus and transmit a signal to the sensory nerve. They collect information from both external and internal environments. They may be grouped together to form a sense organ they may be scattered in the body to perform various functions. Different types of signaling are used for different purposes. Thus, different types of receptors perform different functions. Receptors are biological transducers that convert energy received into electrical signals to be sent to the brain. Receptors can also detect changes in the environment. For example, our skin can respond to pain, touch and temperature. Our eyes get shit when an excess amount of light falls on them.

Thus, the correct answer here is option (D).

Note:
> The afferent nerve fibres connect the receptors to the central nervous system.
> The receptors can also be exteroceptive which is related to external environments, interoceptive related to our body itself and proprioceptive which senses the body postures.
> The receptors in our body collect information about changes in the environment around us in the form of stimuli. When receptors do not work properly, the environmental stimuli are not able to create nerve impulses and the body does not respond.