Outline the three-step sequence of a reflex arc
What will be an ideal response?
The reflex arc begins with 1 ) the detection of a stimulus by a sensory receptor in the PNS. 2 ) The stimulus is delivered to the CNS where integration occurs. 3 ) The rapid motor response is delivered to the effector.
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How does the effector restore homeostasis in a negative feedback loop?
A) The effector causes a rapid change in a variable. B) The effector increases and reinforces the initial stimulus. C) The effector opposes the initial stimulus and shuts off when conditions return to the normal range. D) The effector amplifies the response, but does not continue indefinitely.
Which is not correct regarding B-lymphocytes?
A. Each B-lymphocyte responds to one particular antigen. B. They must be activated by helper T-lymphocytes, which present antigens to them. C. Memory B-lymphocytes may live for months or even years. D. Activated B-lymphocytes transform into plasma cells, memory B-lymphocytes, or NK cells. E. B-lymphocytes produce immunoglobulins.
The joint between adjacent vertebral bodies is a
A. symphysis that is diarthrotic. B. symphysis that is amphiarthrotic. C. synovial that is synarthrotic. D. symphysis that is synarthrotic.
The membranes enclosing the thoracic and abdominopelvic cavities are __________ membranes.
Fill in the blank(s) with the appropriate word(s).