Compare and contrast rods and cones in terms of their number, location, pigment content, and abilities to assist in sharp vision, color vision, and night vision.
What will be an ideal response?
Rods contain rhodopsin and are more numerous, more peripheral, and specialized for night vision. Cones contain photopsins and are responsible for sharp color vision.
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The effects of a neurotransmitter on the postsynaptic membrane include which of the following?
A) The neurotransmitter floats around in the synaptic cleft. B) Upon stimulation, the membrane releases more neurotransmitter molecules. C) Excitatory or inhibitory responses. D) Neurotransmitter molecules are absorbed by the postsynaptic cell. E) None of the answers are correct.
Stretch receptors in the atria are responsible for the secretion of ________.
A. renin B. angiotensin C. atrial natriuretic hormone D. ADH E. aldosterone
The figure illustrates bones of the right lower limb. What does "E" represent?
A. femur B. fibula C. tarsals D. tibia E. patella
Which of the following statements is incorrect
A) When sarcomeres are fully shortened, contraction cannot occur B) When sarcomeres are slightly less than fully shortened, contraction cannot occur C) Sarcomeres can produce the most tension when stimulated over a relatively wide range of resting lengths D) When the muscle is fully stretched, contraction cannot occur E) All sarcomeres in a muscle fiber contract and relax together