Nerves and ganglia are structures found in the
A. central nervous system.
B. central and peripheral nervous systems.
C. peripheral nervous system.
Answer: C
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Which of the following describes a function of cerebrospinal fluid?
1. Mechanical protection 2. pH homeostasis 3. Circulation a) 1 only b) 2 only c) 3 only d) Both 1 and 2 e) All of these choices
Rhodopsin
a. is the photopigment found in the red cones. b. consists of an opsin and retinal c. is most highly concentrated in the fovea. d. is slowly broken down in the absence of light. e. contains a derivative of vitamin B12.
Which of the following statements concerning epithelial cell surfaces is false?
A. Smooth surfaces reduce friction. B. Epithelium with folded surfaces can change shape. C. Epithelial cells with microvilli are involved in absorption. D. Cilia propel materials along the surface of an epithelial cell. E. Epithelium with folded surfaces tends to be very rigid.
Which of the following structures is considered part of the lower respiratory tract?
A. Nose B. Lungs C. Pharynx D. Larynx