Why do asthma sufferers often use inhalers that contain sympathomimetics to ease their symptoms?
A. The drugs are agonists that stimulate adrenergic receptors in the bronchial tubes.
B. Sympathomimetics enhance the release of acetylcholine from preganglionic and postganglionic neurons.
C. The sympathomimetics bind to muscarinic receptors and block them.
D. The drugs are antagonists that bind to adrenergic receptors in the bronchial tubes without stimulating them.
E. Sympathomimetics suppress release of norepinephrine and epinephrine.
Answer: A
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The nervous system
A. provides a support system for the body. B. provides nutrients and nourishment for surrounding cells. C. contracts and generates a force to cause bodily motion. D. controls the movement of muscles.
Name the muscles involved in extending the ankle
A) extensor digitorum longus and extensor hallucis longus B) flexor digitorum longus and flexor hallucis longus C) tibialis anterior, fibularis tertius, extensor digitorum longus, extensor hallucis longus D) gastrocnemius, fibularis brevis, fibularis longus, plantaris, soleus, tibialis posterior E) plantaris, soleus, flexor digitorum longus, flexor hallucis longus
The nucleus of a neuron is found in its
A. glioma. B. axon. C. cell body. D. dendrite.
A misguided athlete ingests a large amount of dietary K+ because she thinks it will boost muscle performance. Instead, the majority of this extra K+ is secreted into filtrate and excreted in the urine.
Answer the following statement true (T) or false (F)