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 ].
Much of the zinc consumed in the diet is not absorbed. A diet high in fiber and phytate (present in whole-grain bread, bran, beans, soybeans, other legumes, and nuts) reduces zinc absorption. Zinc deficiency has many causes, including various disorders, alcoholism, and use of diuretics. People lose their appetite and hair and may feel sluggish and lose their sense of taste. Doctors measure the zinc level in blood and urine, but these tests may not accurately determine zinc status.