How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?
A) It would make the muscles less excitable.
B) It would produce muscle weakness.
C) It would cause spastic paralysis (muscles are contracted and unable to relax).
D) It would cause flaccid paralysis (muscles are relaxed and unable to contract).
E) It would have little effect on skeletal muscles.
Answer: C
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These vessels allow blood to bypass capillary beds:
a. arterioles. b. capillaries. c. metarterioles. d. arteries. e. none of these answers.
Which of the following is involved with delayed hypersensitivity?
A. Contact dermatitis B. Hay fever C. IgE secretion D. All of the choices are correct.
During in utero (fetal) development of the ovary, which of these occurs?
A. Cell division of primary oogonia results in the production of 2 to 4 million primary oocytes, which are present at birth. B. A single primary oogonium remains dormant, which then undergoes rapid mitosis after birth. C. Cell division of primary oogonia, which all complete both meiotic divisions before birth. D. The mitotic division of primary and secondary oocytes produces cells with 23 chromosomes each. E. Cell division of primary oogonia, which all complete the first meiotic division before birth.
When ligand-gated __________ open, ions move in or out of the cell, affecting the membrane potential
Fill in the blank with the correct word.