What structure runs the length of the sarcomere and contributes to the elastic recoil in muscle?
A. M line
B. Actin
C. Titin
D. Z disk
Answer: C
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Which ligament of the knee initiates the knee-jerk reflex when tapped?
A) the medial patellar retinacula B) the patellar ligament C) the lateral patellar retinacula D) the extracapsular ligament
In quiet breathing,
A) inspiration and expiration involve muscular contractions. B) inspiration is passive and expiration involves muscular contractions. C) inspiration involves muscular contractions and expiration is passive. D) inspiration and expiration are both passive processes. E) only the diaphragm is active during inhalation.
In the process of urine formation, first
A. tubular fluid is formed, then filtrate, then urine. B. filtrate is formed, then tubular fluid, then urine.
Intrinsic factor, produced by cells in the stomach, is necessary for the absorption of vitamin ________ in the small intestine
A) B9 B) B3 C) B6 D) B12