What happens when the radial muscle of the eye contracts or shortens?
a. The size of the pupil decreases.
b. The size of the pupil increases
c. The lens becomes more concave.
d. The lens becomes more convex.
e. The iris reflects less light.
b
You might also like to view...
Using the figure below, identify the labeled part.
1. Label A: ______________________________
2. Label B: ______________________________
3. Label C: ______________________________
4. Label D: ______________________________
5. Label E: ______________________________
6. Label F: ______________________________
7. Label G: ______________________________
8. Label H: ______________________________
9. Label I: ______________________________
10. Label J: ______________________________
11. Label K: ______________________________
12. Label L: ______________________________
13. Label M: ______________________________
14. Label N: ______________________________
15. Label O: ______________________________
A reaction which uses water to break bonds between molecules would be catalyzed by a ________ enzyme.
dehydrogenase hydrolase isomerase synthase
Muscles that work together to cause a movement are
A) antagonists. B) fixators. C) convergent. D) prime movers. E) synergists.
Gamma motor neurons
A. are located in tendons. B. transmit action potentials to skeletal muscle. C. regulate the sensitivity of the muscle spindle. D. enable the brain to perceive that a muscle has been stretched. E. innervate the whole muscle.