Which of the following formed elements releases serotonin?
A. Platelets
B. Basophils
C. Erythrocytes
D. Neutrophils
Answer: A
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Cell junctions in contractile cells are called ________, which consist of two components: ________ and ________.
Fill in the blank(s) with the appropriate word(s).
You are dissecting a cadaver. You are tracing an individual neuron as it ascends the spinal cord to the brain. You know that this neuron carries somatic sensory information from an afferent presynaptic neuron. Where will you find its axon terminal?
A. Ascending pathways in the dorsal column of the spinal cord carry information about pain from the back muscles. B. Somatic sensory information from the left side of the body projects to the left side of the somatosensory cortex. C. Ascending pathways in the anterolateral column of the spinal cord carry information about fine touch discrimination. D. All somatic sensory information travels together in a single tract in the spinal cord. E. All somatic sensory information that reaches the cerebral cortex is first processed in the thalamus.
The incus, malleus, and stapes of the middle ear
A. are part of the vestibular apparatus. B. are found inside the cochlear duct. C. serve to amplify the pressure of sound vibrations from the air in the outer ear to the fluid in the inner ear. D. serve to keep the pressure on the two sides of the tympanic membrane equal. E. are in direct contact with both the tympanic membrane and the round window.
__________ hormone promotes the retention of water and decreases volume of urine.
Fill in the blank(s) with the appropriate word(s).