List the steps and briefly explain what happens in orthostatic hypotension. What reflex counteracts it?
What will be an ideal response?
Orthostatic hypotension is the decrease in blood pressure upon moving rapidly from a stable reclining position to standing. While reclining flat, gravity is distributed equally and so is blood. When moving to a standing position, blood initially pools in the lower extremities and cardiac output drops from about 5 L/min to about 3 L/min. Arterial blood pressure then decreases. The baroreceptor reflex should counteract orthostatic hypotension.
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The connective tissue that attaches muscle to bone is called:
a. origin b. insertion c. tendon d. bursae
When a muscle contraction occurs:
a. the actin gets shorter b. the myosin gets shorter c. the Z-lines are pulled closer together d. both A and B
Outside of vertebrates, the octopus has the largest brain to body ratio
Indicate whether the statement is true or false
Which of the following statements regarding hypoxia is correct?
A. Exposure to high altitude is a form of hypoxic hypoxia. B. "Anemic hypoxia" refers to the condition of lower than normal arterial PO2. C. Carbon monoxide poisoning is an example of hypoxic hypoxia. D. Carbon monoxide poisoning is an example of ischemic hypoxia. E. Cyanide poisoning is an example of hypoxic hypoxia.