A three-year-old throws a tantrum at the supermarket. She holds her breath until her face turns blue, and she passes out. Then, she immediately starts normal breathing again. What accounts for this resumption of breathing?
a.) Stimulation of afferents from stretch receptors of lungs
b.) Activation of respiratory centers in the cerebral cortex
c.) Reciprocal inhibition of the phrenic nerve
d.) Loss of influence from the cerebral cortex
Answer: d.) Loss of influence from the cerebral cortex
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The acromion is continuous with a prominent ridge of bone on the posterior surface of the scapula known as the
A) conoid tubercle. B) glenoid cavity. C) coracoid process. D) spine. E) inferior angle.
If the lymphatic vessels of the digestive tract were damaged, we would expect
A. no affect because lymphatic vessels are scarce in the digestive tract. B. a decrease in the absorption of lipids from the small intestine. C. a decrease in the absorption of carbohydrates from the small intestines. D. a decrease in the absorption of amino acids from the small intestine.
The ________ provides most of the Ca2+ needed for myocardial contraction
A) cytoskeleton B) mitochondria C) Golgi apparatus D) sarcoplasmic reticulum E) extracellular fluid
What effect will a neurotransmitter have on the postsynaptic membrane?
What will be an ideal response?