Which structure(s) of the eye are primarily involved in the refraction of light
ID: 97755 • Letter: W
Question
Which structure(s) of the eye are primarily involved in the refraction of light a. Optic nerve b. Retina c. Pupil d. Cornea All of the following are true of myelination except: a. The Na+ and K+ voltage-gated channels are found at the Nodes of Ranvier b. It helps to insulate the axons, reducing leaks c. It is formed by Schwann cells in the peripheral nervous system d. It increases the likelihood that Na+ voltage-gatred channels will open Suppose a hormone binds a G-protein-linked receptor. What would you expect to occur after the hormone binds? a. The receptor dimerizes with another receptor when the hormone binds b. The G-protein hydrolyzes GTP To GDP c. The receptor phosphorylates the G-protein d. The G-protein activates the receptor e. The alpha-subunit dissociates from the Beta- and gamma-subunits Brown adipose tissue (BAT) generates heat in a hamster arousing from hibernation. This response occurs with epinephrine treatment of BAT: however, the BAT must be the first pre-exposed to thyroid hormone. With respect to the concepts in endocrinology, this phenomenon requiring pre-exposure thyroid hormone in order to have a response to epinephrine is called... a. Synergism b. Positive regulation c. Permissiveness d. Amplification e. Pretreatment What is a feature of the hormone insulin? a. It induces gluconeogenesis b. This is a hormone of catabolism c. This hormone tends to increase blood glucose concentrations d. It includes glycogenesis e. Sympathetic stimulation causes its releaseExplanation / Answer
Answer:
21). d. Cornea
Explanation:
Lens & cornea of the eye are primarily responsible for refracting light.
22). d. The Na+ and K+ voltage-gated channels are found at the Nodes of Ranvier
25). d. It includes glycogenesis
Explanation: Insulin is the hormone that converts excess glucose into glycogen. This process is called glycogenesis.
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