To initiate a cardiac muscle cell contraction, calcium
A. binds to calmodulin.
B. binds to troponin.
C. binds to actin.
D. binds to the Z-disc.
E. binds to tropomyosin.
B
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The reticular layer of the dermis consists of what kind of tissue?
A. Reticular connective tissue B. Stratified squamous epithelium C. Dense regular connective tissue D. Dense irregular connective tissue E. Areolar connective tissue
Which is not correct regarding the urinary bladder?
A. The mucosa has rugae for distension. B. The inferior portion of the bladder is called the apex. C. The bladder is held in place by the median umbilical ligament. D. There are two ureteral openings. E. The peritoneum covers only the superior surface of the bladder.
The body of annelids is divided into repeating segments called_________________
Fill in the blank with the correct word.
Match the substance necessary for clotting with its particular role.A. A mixture of lipoproteins released from injured tissueB. Converts prothrombin to thrombinC. The insoluble protein that forms the network of the clotD. Needed by the liver to produce prothrombinE. Fibrin-stabilizing factorProthrombinase
Fill in the blank(s) with the appropriate word(s).