MCAT BIO 4

what is sarcoplasmic reticulum?

modified ER that stores calcium ions in muscle cells
during contraction what happens to A band, H zone and I band?

no change in A band, H zone and I band decrease in length
role of calcium in initiation of sarcomere contraction

Ca binds with troponin, causing confromational shift in tropomyosin, exposing the myosin binding sites
which nervous system inhibits digestion, which promotes it

sympathetic inhibits, parasympathetic promotes
(t/f) blood entering pulmonary capillaries has higher partial pressure of O₂ than the air in the alveoli

False
how does the partial pressure of CO₂ in capillary compare with the partial pressure of CO₂ in alveolar.

capillary has higher partial pressure

Author

allenwhycheng

59436

Card Set

MCAT BIO 4

Description

studying to be a doctor

Updated

2011-01-12T21:09:18Z

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