1. How stimulus evokes a response in our body?
2. Write down the functions of Iris and Pupil present in human eye.
3. Write down the difference between Rod and Cone cells.
4. What is a cochlea? What is it function?
5. How many types of taste can be perceived by our tongue? Name the different types of
papillae present in the tongue.
6. Draw a labeled diagram of the human skin.
7. Which cells of our nose help us to smell and how?
Answers
Ans 1 = When a stimulus is detected by a sensory receptor, it can elicit a reflex via stimulus transduction. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response.
Ans 2 = The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. Eye color is defined by the iris.
Ans 3 = Rods are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity. Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity. The central fovea is populated exclusively by cones.
Ans 4 = This action is passed onto the cochlea, a fluid-filled snail-like structure that contains the organ of Corti, the organ for hearing. It consists of tiny hair cells that line the cochlea. These cells translate vibrations into electrical impulses that are carried to the brain by sensory nerves.
Ans 5 = There are five universally accepted basic tastes that stimulate and are perceived by our taste buds: sweet, salty, sour, bitter and umami. Let's take a closer look at each of these tastes, and how they can help make your holiday recipes even more memorable.
Ans 6 = Esska answer jo mene picture de rkhi hai wo hai. ok
Ans 7 = The olfactory epithelium contains special receptors that are sensitive to odor molecules that travel through the air. These receptors are very small — there are about 10 million of them in your nose! There are hundreds of different odor receptors, each with the ability to sense certain odor molecules..
