The average life span of an erythrocyte in the circulation is
a) 4 to 5 years.
b) 4 to 5 hours.
c) 5 to 9 days.
d) 120 days.
e) 120 weeks.
d
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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.
A large diameter is typical of which type of skeletal muscle fibers?
A. Type I B. Type II
Which of the following is not true of the tunica interna?
A. It contains an epithelial layer of stratified squamous epithelium. B. It is the innermost layer of an artery or vein. C. It contains a basement membrane in both arteries and veins. D. It provides a smooth lining adjacent to the lumen of the blood vessel. E. All of these are true of the tunica interna.
Reflexes involving skeletal muscles are called ________ reflexes.
A. autonomic B. spinal C. skeletal D. somatic E. subconscious