Rigor mortis occurs because ________.
A) the cells are dead
B) sodium ions leak out of the muscle
C) no ATP is available to release attached actin and myosin molecules
D) proteins are beginning to break down, thus preventing a flow of calcium ions
C) no ATP is available to release attached actin and myosin molecules
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A sample of tissue displays many large flattened spaces lined by fenestrated endothelium. Blood moves slowly through these spaces. This tissue sample most likely came from the
A) heart. B) lungs. C) liver. D) kidneys. E) skin.
Myasthenia gravis is a disease characterized by reduction in the number of acetylcholine receptors on skeletal muscles. Which physiological process would be affected? What would someone afflicted by this disease experience? How may this disease be treated?
What will be an ideal response?
What type of eye movement helps you to follow a moving object?
A. Saccadic B. Smooth pursuit C. Fixational D. Vergence
Which of the following secrete antibodies?
A) plasma cells B) dendritic cells C) memory B cells D) antigen-presenting cells