The temperature yesterday was an uncomfortable 98°F. You unwisely chose to play tennis at noon, counting on your body's internal defenses to protect you against heat exhaustion. How did your body respond to this distress?
What will be an ideal response
The thermoreceptors sense the temperature change, and neural stimulation responds by stimulating sweat glands. Their watery products evaporated at the skin surface and cooled the body. Blood vessels in the dermis also responded by dilating and releasing heat to the exterior.
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The superior and inferior lobes of the left lung are separated by (the)
A) sagittal fissure. B) horizontal fissure. C) transverse fissure. D) oblique fissure. E) None of the answers are correct.
What type of membrane lines cavities that open to the outside of the body?
A) mucous membrane B) serous membrane C) synovial membrane D) cutaneous membrane
Which of the following changes have the potential to dramatically affect the potential difference across the plasma membrane?
A. increased permeability of the membrane to sodium ions B. increased intracellular concentration of potassium ions C. any change in the rate at which the sodium-potassium pump works D. increased permeability of the membrane to sodium ions and increased intracellular concentration of potassium ions E. increased permeability of the membrane to sodium ions, increased intracellular concentration of potassium ions and any change in the rate at which the sodium-potassium pump works
SA nodal cells are autorhythmic.
Answer the following statement true (T) or false (F)