Explain what structures contribute to the function of the nasal cavities
What will be an ideal response?
Air is filtered, warmed, and moistened as it travels through the nasal cavities of the conducting zone of the respiratory system. The paranasal sinuses also warm, humidify, and filter incoming air. Hairs in the vestibule of the nasal cavity prevent particles and insects from entering the nose. Air turbulence is increased by the nasal conchae which help extract debris from inhaled air. Foreign debris sticks to the mucus lining the nasal cavity. Goblet cells in the mucosa of the nasal cavity secrete mucus to trap foreign particles and cilia beat in unison to propel debris toward the posterior nasal cavity where it can be swallowed or expelled by sneezing or blowing one's nose.
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Which of the following is not true regarding the vertebral canal?
A) It encloses the spinal cord. B) It is formed by vertebral foramina of successive vertebrae. C) The anterior border is the vertebral body. D) It is found only in cervical and thoracic vertebrae. E) The posterior border is the vertebral arch.
The inherited brain disorder Huntington's disease is caused by the destruction of basal nuclei that use different neurotransmitters. One neurotransmitter is ________ and the other is ________
A) acetylcholine; serotonin B) serotonin; norepinephrine C) norepinephrine; serotonin D) acetylcholine; GABA E) glutamate; serotonin
The acrosome contains enzymes used to __________.
A. dissolve the mucosa of the vagina B. dissolve the mucosa of the uterus C. dissolve the stickiness of the semen D. penetrate the vagina E. penetrate barriers surrounding the ovum
Which bone forms the back of your head?
A. The temporal bone B. The parietal bone C. The occipital bone D. The sphenoid bone E. The ethmoid bone