Nervous and Immune Systems Test (Ch. 9/10) Flashcards
Information from your brain is moved to your leg muscles by motor neurons.
T
Electrochemical messages are carried by the movement of ions through the nerve membrane.
T
When the nerve cell is excited, it becomes more permeable to potassium ions that sodium ions.
F
There are more nerve networks leading to the legs and arms than to the thumb and fingers.
F
A connection between the hypothalamus and the pituitary gland unites the nervous system with the endocrine system.
T
The skin is a physical and psychological barrier against invading microbes.
F
If a foreign bacteria enters the skin, the first leukocyte it will meet will be a macrophage.
T
During an allergic reaction, more water is absorbed into the capillaries and the tissues shrink.
F
Bacteria and viruses can develop small mutations causing them to be unrecognizable by the immune system.
T
Most contact infections enter through the skin.
F
The coordination of motor activities in mammals is carried out by which of the following?
b. cerebellum
Exocytosis is used by the synaptic vesicles to remove their contents at which of the following?
e. presynaptic membrane
Given the steps shown below, which is the correct sequence for transmission at a chemical synapse?
I. neurotransmitter binds with receptor
II. calcium ions rush into neuron’s cytoplasm
III. action potential depolarizes the presynaptic membrane
IV. ion gate opens to allow particular ion to enter cell
V. synaptic vesicles release neurotransmitter into the synaptic cleft
c. III, II, V, I, IV
Focusing the eye is achieved by changing the shape of the lens. This is called
e. accommodation
An action potential’s rate of propagation depends on which of the following?
e. all of the above
A patient with symptoms of tremors, an irregular walk, and halting speech might have experienced trauma to which of the following?
c. cerebellum
When the neuron generates an action potential, the potassium ions are which of the following?
b. in greater amounts inside the neuron than outside
Synapses perform the following functions:
I. speed the flow of impulses through networks of neurons
II. filter out random impulses from neural circuits
III. impose a one-way flow of information on neural networks
IV. facilitate a neural pathway
V. inhibit a neuron
a. II, III, IV, V only
Fine motor movement is controlled by which part of the brain?
d. cerebrum
Vision difficulties are associated with which lobe of the brain?
d. occipital
Damage to which of these types of nerves is usually permanent?
b. grey matter
Which part of the neuron receives sensory information?
a. dendrite
Interneurons are most commonly located in which of the following?
b. central nervous system
Which of the following is not an effector?
d. brain
Integration of simple responses to certain stimuli, such as the knee jerk response, is accomplished by which of the following?
a. spinal cord
Which of the following might weaken the immune system?
e. all of the above
Which of the following enzymes found in tears is capable of destroying the cell wall material of bacteria?
a. Iysozyme
The AIDS virus infects which of the following cell types?
b. helper T cells
Which of these symptoms is NOT a manifestation of the inflammatory response?
c. production of specific antibodies
Sex: male
Age: 34
Blood Type: O
WBC count: 25 000/mm3 (Normal = 7000/mm3)
RBC count: 2.5 million/mm3 (Normal = 5 million/mm3)
Body Temp: 38.4 degrees C
Pulse Rate: 72 beats/min
Knowing the information above about a patient, a doctor might suspect that the excess white blood cell count could possibly be an indication of which of the following?
c. leukemia
T cells become mature in which of the following?
c. thymus gland
Which of the following is NOT a description of allergy?
c. T cells are the most important contributors to the condition
____ is the first process to occur in an inflammation.
b. release of histamine from mast cells
