Definition: A muscle in the hand or foot that allows for movement against another muscle, helping to grasp or manipulate objects.

Example: The opponens muscle in the thumb allows for a strong grip when holding items.

Definition: The quality or ability of a part of the body, especially a thumb, to be positioned opposite to the fingers, allowing for grasping and holding objects.

Example: The opposability of the human thumb is what allows us to grip tools effectively.

Definition: Able to be placed opposite to something else, especially in reference to fingers or thumbs that can touch or grasp other fingers.

Example: Humans have opposable thumbs that allow them to grip objects tightly.

Definition: A type of protein found in the retina that helps in the process of vision by forming visual pigments when combined with other molecules.

Example: Opsins are essential for converting light into visual signals in the eyes.

Definition: Relating to substances that mark pathogens for destruction by immune cells.

Example: The opsonic properties of the serum enhanced the immune response against the bacteria.

Definition: A type of protein or antibody in the blood that helps the immune system recognize and attack foreign cells, like bacteria, by making them easier for immune cells to destroy.

Example: Opsonins play a crucial role in the immune response by marking pathogens for destruction.

Definition: To mark a pathogen or foreign particle for destruction by immune cells, making it easier for the immune system to recognize and eliminate it.

Example: The immune system can opsonise bacteria to help white blood cells identify and attack them more effectively.

Definition: To make certain cells, like bacteria, easier for the immune system to recognize and destroy.

Example: The vaccine helps to opsonize the bacteria, making it easier for the body to fight off infections.

Definition: To make a choice or decision about something.

Example: She decided to opt for the vegetarian meal instead of the meat dish.

Definition: Related to the eye or the ability to see, often involving the science of light and vision.

Example: The optic nerve transmits visual information from the eye to the brain.

Definition: A part of an optical instrument, such as a lens or mirror, that helps to focus or direct light.

Example: The scientist adjusted the optic to improve the clarity of the image.