With the transmission electron microscope skeletal muscle fibers can be seen to contain structures called triads. What do the two lateral components of a triad represent?
A. Attachment sites for thick myofilaments
B. Sites for calcium sequestration and release
C. Sites for impulse conduction into the fiber
D. Sites for ATP production
E. Sites for synthesis of proteins to be secreted outside the cell
Select your answer:
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Vaccines › ViewWhich is the first vaccine that an infant is given after birth in India?
A. Tetanus
B. BCG
C. Typhoid
D. Polio
Respiratory System › View
Sarah has a chest x-ray that shows she has tubercles in her lungs. What does that mean?
A. She had tuberculosis in the past but has recovered.
B. She has a dormant form of tuberculosis that could become active if her resistance is lower.
C. She has an active case of tuberculosis and is being treated with antibiotics.
D. She has a history of an infection that is similar to tuberculosis and therefore is immune to TB.