abubunervous.three.two Flashcards
Which of the following accurately describes a sensation?
-An action potential is generated when touch receptors are stimulated.
The glial cells that form a myelin sheath around axons are
-Both “the Schwann cells” and “the oligodendrocytes” are correct.
Which of the following statements about summation in the nervous system is INCORRECT?
-Spatial summation also occurs when local potentials overlap in time.
Gaps between segments of oligodendrocytes or between individual schwann cells are called
-Nodes of Ranvier
The _____ consists of the brain and spinal cord.
-Central Nervous System
In a neuron, short branching cytoplasmic extensions that receive information and carry it to the cell body are called ______
-Dendrites
Continues conduction of the action potential
-Both “occurs in the myelinated axons” and “is a function of the nodes of Ranvier” are correct.
The ________ of the reflex hammer is used to tap on tendons or ligaments.
-Broad Flat slide
The ________ of the reflex hammer is used to touch and move over areas of the skin.
-Metallic Tip
The ________ of the reflex hammer is used to touch a finger over a structure in the body.
-Pointed Side
Most sensory input that ascends through the spinal cord and brainstem projects to the _____.
-Thalamus
If blood glucose decreases below normal,
-The nervous system will malfunction.
White matter of the CNS
-Is formed by bundles of parallel axons with their myelin sheaths.
Chemical substances released from the presynaptic terminal
-Are called neurotransmitters
Which of the ff would be an expected symptom of amge to the temporal lobe?
-Impaired recognition of sounds
Francis is suffering from dizziness. His family doc has run several tests and believes the problem is damage to a cranial nerve. Which nerves is most likely damaged?
-Vestibulocochlear Nerve
A small, rounded body on the midline, nearest the cerebrum, is the ______.
-Pineal Body
Diencephalon
Chuck Wildlee, a baseball pitcher, was struck on the head by a line drive hit by Charley Hussek. Fortunately, Chuck was not seriously injured, but when he was revived, he couldn’t remember how many balls and strikes the batter had. This was because
-He lost both working and short-term memory
Disruption of the blood supply causing death of parts of the brain also causes the group of clinical conditions referred to as
-A cerebrovascular accident (a stroke)
Trina was reading about a supplement that can help a person lose weight. When she tried it, she experienced some horrible side effects. Her heart rate was high and she perspired profusely. It appears from these effects that the supplement increased_______
-Sympathetic
The type of memory that is involved with the retaining of facts such as names or dates as well as associated emotional undertones is called____ memory
-Declarative
The grooves between the gyri are called ____.
-Sulci
The axon may be wrapped with a series of neuroglial cells called the _____.
-Schwann Cells
