Which type of cells in the retina enable night vision?

Which type of cells in the retina enable night vision?

• A. Cones
• B. Rod cells
• C. Ganglion cells
• D. Bipolar cells

Answer: (B)

Rod cells are the type of photoreceptor cells in the retina that enable night vision. They are highly sensitive to light, allowing them to function well in low-light conditions. Rods do not detect color but are crucial for peripheral and dim-light vision. They contain the pigment rhodopsin, which absorbs photons and triggers the phototransduction cascade, leading to the perception of light in dark environments. In contrast, cones are responsible for color vision and function best in bright light, making them less effective in dim conditions. Ganglion cells transmit visual information from the retina to the brain but do not play a direct role in light detection. Bipolar cells act as intermediaries between photoreceptors and ganglion cells but are not directly responsible for light sensitivity. Thus, rod cells are essential for enabling vision in low-light settings, solidifying their role in night vision.

Rod cells are the type of photoreceptor cells in the retina that enable night vision. They are highly sensitive to light, allowing them to function well in low-light conditions. Rods do not detect color but are crucial for peripheral and dim-light vision. They contain the pigment rhodopsin, which absorbs photons and triggers the phototransduction cascade, leading to the perception of light in dark environments.

In contrast, cones are responsible for color vision and function best in bright light, making them less effective in dim conditions. Ganglion cells transmit visual information from the retina to the brain but do not play a direct role in light detection. Bipolar cells act as intermediaries between photoreceptors and ganglion cells but are not directly responsible for light sensitivity. Thus, rod cells are essential for enabling vision in low-light settings, solidifying their role in night vision.