Which is a true process when light strikes a visual pigment?
a. Bleaching occurs when the rhodopsin molecule breaks down into retinal and opsin.
b. On absorbing light, retinal changes to a more circular shape.
c. The location of the stimulated horizontal cells indicates the specific portion of the retina stimulated by the arriving photons.
d. Opsin activation changes the permeability of the outer segment to potassium.
Answer: a. Bleaching occurs when the rhodopsin molecule breaks down into retinal and opsin.
You might also like to view...
The primary regulator of plasma Na+ concentration is ________.
A. insulin B. aldosterone C. renin D. antidiuretic hormone (ADH) E. atrial natriuretic hormone
Which person is at highest risk of developing a cutaneous carcinoma?
A. A light-complexioned man age 52 who goes to the beach on summer weekends and does not use sunblock because he likes to be tan B. A black woman who spends most of her time in her office C. A twenty-two-year-old college student who is outdoors often and uses sunblock D. An eighty-year-old who spends most of her time indoors
The declining FSH levels during the follicular phase results in most of the developing follicles to undergo
A) Conversion into corpora lutea. B) Degeneration by atresia. C) Development into nurse cells. D) Development into Graafian follicles.
List the nine functions of the hypothalamus
What will be an ideal response?