22 results found

Search Results for: photoreceptor

Photoreceptor

Photoreceptor (Science: cell biology) A specialised cell type in a multicellular organism that is sensitive to light. This... Read More

Protist

Protist Definition What is a protist? All protists are eukaryotes, i.e. organisms with the nucleus. However, they are... Read More

Punctum caecum

Definition noun A region in the retina that does not contain photoreceptors thus leads to the normal blind spot in the... Read More

Blindness – Evolutionary regression? Maybe not!

The recent Netflix's hit flick, Bird Box, surely startled the viewers with the thrilling scenarios revolving around the... Read More

Animal cell

An animal cell is the fundamental functional unit of life of animals. It is also the basic unit of reproduction. Animal... Read More

Cyclic guanosine monophosphate

Definition noun plural: cyclic guanosine monophosphates (biochemistry) A cyclic form of guanosine monophosphate (chemical... Read More

Tapetum

Definition noun, plural: tapeta (botany) A layer of nutritive cells within the sporangium, providing nutrition for growing... Read More

Tapetum lucidum

Definition noun, plural: tapeta lucida A layer of tissue in the choroid or in the retinal pigment epithelium of the eye of... Read More

Pineal gland

Definition noun, plural: pineal glands A small endocrine gland shaped like a pinecone, located in the epithalamus, and... Read More

Sensory neuron

Definition noun, plural: sensory neurons A type of neuron that transmits sensory nerve impulses Supplement The neurons are... Read More

Plant

Plant Definition (botany) Any of the eukaryotic organisms of the biological kingdom Plantae, characterized by being... Read More

Cell

A cell is a membrane-bound structure that occurs as a functional independent unit of life (such as in unicellular organisms,... Read More

Retinol

Definition noun A yellow, fat-soluble vitamin with a formula: C20H30O, present in fish oils and green vegetables, and... Read More

Thermoreceptor

Definition noun, plural: thermoreceptors The sensory nerve ending in a sensory cell sensitive to changes in temperature... Read More

Felidae

Definition noun A taxonomic family of Carnivora embracing domestic and wild cats such as lions and tigers Supplement Felidae... Read More

Flagellum

Definition noun, plural: flagella (1) (biology) Long, slender, threadlike, whiplike extension of certain cells or... Read More

Blind spot

Definition noun (1) Anatomically, the region in the retina that is not sensitive to light and where the optic nerve and... Read More

Stimulus

We can detect hot or cold environments using our sense of temperature. When the temperature is too hot, sweating... Read More

Retina

retina light sensitive layer of the eye. In vertebrates, looking from outside, there are four major cell layers: (i) the... Read More

Rods

rods (retina) One of the two photoreceptor cell types of the vertebrate retina. In rods the photopigment is in stacks of... Read More