KROK 1 2007 – Question 170 · KROK (Medicine) · Histology, Cytology, and Embryology
Vitamin A deficit results in the impairment of twilight vision. Name the cells that have the above-mentioned photoreceptor function:
- A. Rod receptor cell
- B. Horizontal neurocytes
- C. Ganglion neurocytes
- D. Cone receptor cells
- E. Bipolar neurons
Hint
Dim-light vision depends on the photoreceptor type with the most light-sensitive pigment, which needs vitamin A and is concentrated away from the fovea in the retinal periphery.
The answer, the explanation and a note on every option are available once you log in. The account is free: topic tests, a mock exam, mistake review and statistics.
More questions on Histology, Cytology, and Embryology
- During pubescence the cells of male sexual glands begin to produce male sex hormone testosterone that calls forth secondary sexual characters. What…
- A patient complains of dryness of head skin, itching, fragility and loss of hair. After examination he was diagnosed with seborrhea. Disturbed…
- An electronic microphotograph shows a macrophagic cell with erythrocytes at different stages of differentiation located along its processes. This is…
- A histological specimen presents a receptor zone of a sensoepithelial sense organ. Cells of this zone are placed upon the basal membrane and include…
- A patient was admitted to the hospital with an asphyxia attack provoked by a spasm of smooth muscles of the respiratory tracts. This attack was…
- A patient has been given high doses of hydrocortisone for a long time. This caused atrophy of one of the adrenal cortex zones. Which zone is it?