Multiple Choice
Sympathetic stimulation of the iris causes
A) Opening of the iris by stimulating the dilator muscles
B) Closing of the iris by stimulating the dilator muscles
C) No effect on the iris
D) Opening of the iris by stimulating the sphincter muscles
E) Closing of the iris by stimulating the sphincter muscles
Correct Answer:
Verified
Correct Answer:
Verified
Q9: Neurons in the left optic nerve carry
Q10: Cones are most highly concentrated in the<br>A)
Q11: W hich of the following does NOT
Q12: Retinal cells that produce action potentials include<br>A)
Q13: The “blind spot” in the visual field
Q15: “Bleaching” refers to the conversion of 11
Q16: The optic nerve makes initial synaptic contact
Q17: Contraction of the ciliary body<br>A) Releases tension
Q18: The three layers of the outer eyeball
Q19: The function of the iris is to<br>A)