Obstruction of the ________ will cause a more severe myocardial infarction (MI) than the obstruction of any of the others
A) left coronary artery (LCA)
B) anterior interventricular branch
C) posterior interventricular vein
D) left marginal vein
E) circumflex branch
A
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What structure is also known as the "voice box"?
A. Larynx B. Pharynx C. Esophagus D. Bronchus E. Trachea
The plasma membrane of a neuron is more permeable to potassium ions because
A. of its positive electrical charge. B. there are more leak ion channels for K+ than Na+. C. protein molecules cannot exit through the cell membrane. D. calcium ions block Na+ and Cl- channels. E. there are more leak ion channels for Na+ than K+.
There are twelve thoracic vertebrae
Indicate whether the statement is true or false.
This structure is responsible for the secretion of melatonin
A) Pituitary gland B) Pineal body C) Thalamus D) Hypothalamus