Aetna....i am pretty sure thats what my professor told me but he is not th brightest so.....................
The sliding filament theory is the explanation for how muscles contract to produce force. As we have mentioned on previous pages, the actin and myosin filaments within the sarcomeres of muscle fibres bind to create cross-bridges and slide past one another, creating a contraction.
Usually, the baby's eyes will open around 26-28 weeks gestation.
The heart develops around week five, and begins to beat at the end of the 5th week. A heartbeat via ultrasound by 6 weeks, by 10-12 weeks you should hear the heartbeat with a Doppler device. A heartbeat usually won't be detected at 4-5 weeks of pregnancy.
Preparation for childbirth begins anywhere from 30-32 weeks during the process called lightening (the baby turns to a head-down position), however, the baby can flip to the head-down position, then flip again, and so on.
The formation of hair and eyelashes begins during week 22, so the answer is B. Formation of hair and eyelashes.
Answer:
Taste buds are sensory organs that are located on our tongue and let us feel tastes that are sweet, salty, sour, and bitter. Taste receptor cells, also known as gustatory cells, are found in taste buds.
Answer:
Margaret Chan,
Vikram Patel
Francis S. Collins
Arunachalam Muruganantham
Tom Frieden
