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Danielle G (2024-2)
Physiology 7-13
Question | Answer |
---|---|
What mechanism quickly terminates the action of a neurotransmitter once it binds to its postsynaptic receptor? | Neurotransmitter molecules are transported back into synaptic knobs; Neurotransmitter molecules are transported into nearby glial cells; Neurotransmitter molecules are metabolized into inactive compounds. |
Normal infants will show the Babinski reflex up to the age of _____ years. | 1.5-2 |
Sympathetic responses generally have widespread effects on the body because: | preganglionic fibers synapse with several postsynaptic fibers. |
True or False: Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation | True |
Norepinephrine is liberated at: | sympathetic preganglionic nerve endings |
All of the following are non-steroidal hormones except: Oxytocin Calcitonin Cortisol Glucagon | Cortisol |
The vagus is said to act as a "brake" on the heart. This situation is called: | Vagal inhibition |
During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava |
The function of which antibody is basically unknown? | IgD |
Ciliated cells lining the respiratory tract: | help move the mucus blanket toward the pharynx |
Which ear structures are responsible for the amplification and transfer of sound from the external ear to the inner ear? | the ossicles |
The chemoreceptors in the carotid bodies are particularly sensitive to: | hypercapnia |