Biol Quiz 7

The ________ ventricle is associated with the pons and upper portion of the medulla oblongata.

Fourth

The ________ acts as a switching and relay center for integration of conscious and unconscious sensory information and motor commands.

diencephalon

Another name for the patellar reflex is the

knee jerk reflex

Which of the following delivers poorly localized sensations of touch, pressure, pain, and temperature to the primary sensory cortex?

spinothalamic pathway

The effects of neurotransmitters released by the modified neurons of the adrenal medullae resemble those produced by stimulation of

sympathetic postganglionic fibers.

When a cerebrospinal fluid specimen is needed for testing, the specimen is removed by needle from the L3-L4 interspace area of the vertebral column. Why?

There would be no possible damage to the spinal cord itself when the needle is inserted into the space.

Which of the following is the correct order of events that occur at a cholinergic synapse? 1. Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine. 2. Acetylcholine is removed by acetylcholinesterase. 3. Acetylcholine binds to receptors and depolarizes the postsynaptic membrane. 4. Axon terminal depolarizes.

4, 1, 3, 2

The resting potential of a neuron is

-70 mV

Which cranial nerve is responsible for the motor innervation of pharyngeal muscles and parotid salivary glands?

IX

The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by

oligodendrocytes.