Which of the following is true of the orbital complex?
A) Nasolacrimal canal is formed by maxillae and ethmoid bone.
B) Lacrimal fossa carry mucus from one sinus to another sinus.
C) Infra-orbital foramen are formed by maxillae.
D) Lacrimal sulcus allows passage of the optic nerve out of the orbit.
E) Supra-orbital notch carries tears from the nasal cavity to the orbit.
Answer: C
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Answer the following statements true (T) or false (F)
1. The bony cochlea coils around a central hub, which is called the spiral ganglion. 2. The hair cells of the cochlear duct are found in the modiolus. 3. The cochlear duct is separated from the tympanic duct by the basilar membrane. 4. The membrane attached to the inner wall of the cochlear duct that causes the stereocilia of the hair cells to distort when it bounces up and down is the tectorial membrane. 5. The cell bodies of the sensory neurons that monitor the receptors in the cochlear duct are contained in the spiral ganglion.
The partial pressure gradient for oxygen in the body is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues. What law describes this
phenomenon? What will be an ideal response?
The upper limb and its girdle are attached rather loosely to the rest of the body. This arrangement
A. results in a disjointed appearance. B. limits fine coordination of the hands. C. allows a wide range of movements. D. restricts the amount of weight the upper limb can support. E. results in a limited range of motion.