What anchors thin and elastic filaments in place within the myofibril?
A) Z disc B) I band C) A band D) M line
Answer: A
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Many vertebrates' response to hypoxia is contraction of which organ?
A) Liver B) Pancreas C) Spleen D) Lung
Answer the following statements true (T) or false (F)
1. Cerebrospinal fluid is returned to the blood by being absorbed in the choroid plexus. 2. A blockage of the flow of cerebrospinal fluid can result in a condition called hydrocephalus. 3. A plexus allows the fibers from several spinal nerves to reorganize into a single peripheral nerve. 4. A skin surface area supplied by a single spinal nerve is called a plexus. 5. The autonomic nervous system is more likely to stimulate a smooth muscle than a voluntary muscle.
Squamous cell carcinoma originates in the
A. deepest layer of the dermis. B. deepest layer of the epidermis. C. superficial dermis. D. superficial epidermis.
During coagulation, which of the following is found in the extrinsic mechanism only?
A) Prothrombin activator B) Thromboplastin C) Prothrombin D) Calcium E) Thrombin