The movement of either eye into an up/right, up/left, down/right, down/left, up, down, right, or left position of gaze involves the linked and associated contractions and relaxations of multiple eye muscles, of the same eye and of the opposite eye, at the same time.ith the left eye looking to the right, if the IO muscle also were to contract, the front of this eye would move upward as well. Both eyes then would be looking up and to the right. This yoked or conjugate movement of these two muscles, right SR and left IO, is depicted in the first (top/left) image of the chart above.
Phytatesâwhich are present in whole-grain breads, cereals, legumes, and other foodsâbind zinc and inhibit its absorption [ 2, 12, 13 ]. Thus, the bioavailability of zinc from grains and plant foods is lower than that from animal foods, although many grain-and plant-based foods are still good sources of zinc [ 2 ].
Heme iron is absorbed more efficiently than non-heme iron found in plants and dietary supplements. Other nutrients, however, such as vitamins C and B12, folate or zinc can facilitate sufficient non-heme iron absorption. Consuming certain foods and medications can interfere with the absorption of iron. These include dairy products, coffee, tea, chocolate, eggs, and fiber. Medication that inhibit iron absorption include antacids, proton pump inhibitors (to treat acid reflux) or calcium supplements.