Discuss the two types of photoreceptors and the function of each
What will be an ideal response?
The two types of photoreceptors are rods and cones. Cones contain pigments that allow us to perceive color; they function best in bright light. Rods cannot detect color, but they are sensitive and capable of responding in less intense light. Cones are highly concentrated in the fovea centralis while rods are more important for peripheral vision, which detects images at the edge of our vision.
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GnRH
a. stimulates both FSH and LH secretion b. is inhibited by testosterone c. has low-level activity during the prepubertal period d. both stimulates FSH and LH secretion and is inhibited by testosterone e. has all of the above characteristics
Neurons that have one axon and numerous dendrites are structurally classified as ________.
Fill in the blank(s) with the appropriate word(s).
The __________ cells of the stomach produce and secrete hydrochloric acid (HCl).
a) G b) mucus neck c) parietal d) chief
Pituitary hormones are not secreted at a steady rate. GH is secreted mainly _____, while PRL is secreted mainly _____.
a. in the morning; during pregnancy and nursing b. at night; during pregnancy and nursing c. at midday; during labor d. in the morning; during labor e. at night; during labor