Which of the following is true of receptors?
A) Structurally, they are similar to glandular tissue.
B) They monitor conditions inside the body or in the external environment.
C) They are present in the peripheral parts of the body only.
D) All types are capable of responding to all types of stimuli.
E) None of the answers
B) They monitor conditions inside the body or in the external environment.
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A 22-year-old student has to have a physical examination to certify that he is able to participate in interscholastic athletics
During the cardiovascular examination, you report his heart rate as 60 beats/min and his arterial blood pressure at 118/68 mm Hg. From echocardiography, his end-diastolic volume is 150 mL and his end-systolic volume is 60 mL. From the data, you estimate his pulse pressure to be: A. 50 mm Hg B. 60 mm Hg C. 68 mm Hg D. 80 mm Hg E. 90 mm Hg
Which medical imaging technique relies on the absorption of high-energy radiation and reveals dense tissues such as bone and teeth?
A. Positron emission tomography (PET) scan B. Sonography C. Computed tomography (CT) scan D. Magnetic resonance imaging (MRI) E. Radiography
What percentage of total oxygen (O2) is carried within red blood cells chemically bound to hemoglobin?
a. 5 percent b. 68 percent c. 98 percent d. 100 percent
The nerve fibers in the dermis stimulate
A. muscles and glands in the dermis. B. blood vessels in the epidermis. C. melanocytes in the epidermis. D. fat cells in the subcutaneous layer.