Which one of the following systems responds to environmental stimuli?
A) muscular
B) lymphatic
C) immune
D) nervous
D) nervous
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You examine a patient in the emergency department following a bee sting to the bridge of her nose. Both of the patient's eyes are swollen shut because:
A) the sting interfered with the nerve that raises the eyelid. B) the sting blocked lymph drainage from the region. C) the face is characterized by very cutaneous veins that ruptured from the sting. D) the face is characterized by very cutaneous arteries that ruptured from the sting. E) the face is characterized by very loose subcutaneous connective tissue that allows accumulation of excessive fluid with inflammation.
Which hormone increases osteoclast activity to release more calcium ions into the bloodstream?
A) calcitonin B) thyroxine C) parathyroid hormone D) estrogen
The blind spot of the eye is caused by ________
A) the macula lutea interrupts the nerve pathway B) there are no photoreceptors where the optic nerve leaves the eye C) an absents of cones in the foveae D) more rods than cones within the retina
Extracellular fluid
a. includes plasma b. includes interstitial fluid c. constitutes a smaller percentage of total body water than does intracellular fluid d. includes lymph e. has all of the above characteristics