Which of the following statements is NOT true about the shape, position and location of the heart?
a. The heart is located between the two lungs within the mediastinum.
b. Approximately two-thirds of the heart is found to the left of the midline.
c. The heart is enclosed in a double-layered sac called the pleural membrane.
d. The heart is shaped like a cone with the base facing the right shoulder.
Answer: c. The heart is enclosed in a double-layered sac called the pleural membrane.
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What role does a first-order neuron play in the passage of a sensory signal to the brain?
A. The soma of the first-order neuron is in the cerebral cortex, and the axon terminates in the spinal cord. B. The first-order neuron carries the signal to the sensory area of the cerebral cortex. C. The first-order neuron detects the stimulus and transmits a signal to the spinal cord or brain-stem. D. The first-order neuron carries the sensory signal to the thalamus. E. The first-order neuron has no role in sensory signal transmission.
Your friend ate some shellfish, and as a result, his face and hands become swollen and red. You recommend he take an antihistamine. This may be effective in alleviating his symptoms because ________.
A. the medication will relax the bronchial smooth muscles, allowing him to breathe more freely B. the medication should increase the vascular permeability of the irritated tissue, allowing immune cells to enter the tissue C. the medication will help to prevent the escape of fluid and plasma proteins into the extracellular space D. the medication should cause vasodilation to the tissues, allowing cells of the immune system to remove the foreign antigens
The study of the muscular system is known as __________.
A. kinesiology B. pathophysiology C. myology D. biology E. neurology
Which of the following correctly matches the valve to its function?
A. Aortic valve-permits one-way blood flow from the right ventricle to the pulmonary trunk B. Mitral valve-permits one-way blood flow from the left atrium to the left ventricle C. Tricuspid valve-permits one-way blood flow from the right to the left atrium D. Pulmonary valve-permits one-way blood flow from the left ventricle to the aorta