The role of the accessory structures of the eye is to ________
A) focus light waves onto the retina
B) prevent incoming light waves from being reflected out of the eye
C) change the shape of the lens while focusing on objects that are distant or near
D) protect the eye from airborne particles and dust
D
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What is the action of the binding of muscarine to its receptors in the digestive system?
A. Alpha subunits bind to K+ channels, open them, leading to hyperpolarization. B. Beta-gamma subunits bind to K+ channels, open them, leading to hyperpolarization. C. Beta-gamma subunits bind to K+ channels, close them, leading to depolarization. D. Alpha subunits bind to K+ channels, close them, leading to depolarization.
For a person whose hematocrit is 45%, in which choice below are the components of blood correctly ranked in order of decreasing percent volume?
A. WBCs, plasma, RBCs B. RBCs, WBCs, plasma C. plasma, RBCs, WBCs D. plasma, WBCs, RBCs E. WBCs, RBCs, plasma
The ________ digests ONLY protein, not other nutrients.
A. stomach B. small intestine C. mouth D. large intestine E. esophagus
Which of the following is an accessory organ of the digestive tract?
A. Stomach B. Large intestine C. Liver D. Pharynx