What nerve mediates the receptive relaxation response?
a. vagus
b. gastric
c. thoracic
d. lumbar
e. accessory
a
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Which of the following features distinguishes cardiac muscle from skeletal muscle?
a. Cardiac muscle contraction is modified by hormones. b. Cardiac cells lack T tubules. c. Only cardiac muscle has slow myosin ATPase activity. d. In skeletal muscle Ca2+ is released from the sarcoplasmic reticulum. e. Skeletal muscle has thick myosin and thin actin filaments
Which ligament is not associated with the glenohumeral joint?
A. Coracoacromial ligament B. Coracohumeral ligament C. Glenohumeral ligament D. Humeral collateral ligament
How do low-density lipoproteins (LDLs) move into cells?
A. LDLs diffuse through channels in the membrane. B. LDLs are engulfed through receptor-mediated endocytosis. C. LDLs diffuse through the phospholipid bilayer. D. LDLs are transported through a pump that is also an ATPase.
Why is the osmotic pressure higher in the blood compared to that in the surrounding interstitial fluid?
A) Interstitial fluid contains more dissolved proteins than blood. B) Blood has lower solute concentrations. C) Interstitial fluid has higher solute concentrations. D) There are equal concentrations of dissolved proteins in blood and interstitial fluid. E) Blood contains more dissolved proteins than does interstitial fluid.