Through which valve must blood pass as it moves from the right atrium to the right ventricle?
A. Right atrioventricular
B. Pulmonary
C. Aortic
D. Venous
Answer: A. Right atrioventricular
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Which of the following is not a feature of skeletal muscle?
A. Autorhythmicity B. Excitability C. Extensibility D. Conductivity E. Contractility
Which of the labeled structures in the diagram is the thalamus?
a) A b) B c) C d) D e) E
The scrotal location of the testes provides the cooler environment essential for spermatogenesis
Indicate whether the statement is true or false
A patient appears in a clinic complaining of irritability and chronic sweatiness
He also has a lump in his neck near his larynx. Blood tests show he has low levels of thyroid-stimulating hormone (TSH) in his plasma. Which of the following is the most likely diagnosis? A. primary hypothyroidism B. an iodine-insufficient diet C. secondary hypothyroidism D. hyposecretion of TRH E. Graves' disease