Your answer is B.
The all or nothing principle means that an entire neuron depolarizes to its maximum strength.
Answer:
A myosin head bound to actin
Explanation:
Cross bridge cycling explains the sliding filament theory according to which thin and thick filament slide against each other for muscle contraction. The two myosin heads extend form the thick filament. One myosin head has binding site for ATP and other head has binding site for actin from thin filament.
When myosin head binds to actin a cross bridge is formed. When ATP binds to the other head the bridge dissociates. Actin binding site is free and myosin tries to bind with other actin during which ATP is hydrolysed into ADP and Pi. Myosin along with the ADP and free Pi successfully binds to another actin molecule. The cross bridge formed generates a powerful force and ADP and Pi are displaced from it. The cross bridge is now free again for binding of next ATP molecule and the cycle continues.
Answer:
yes
Explanation:
In biology, a solution outside of a cell is called hypotonic if it has a lower concentration of solutes relative to the cytosol.
Answer:
The correct answer is drink seawater and secrete excess ions mainly through their nasal salt glands.
Explanation:
Avians or Birds that live in marine environments are often referred to as seabirds. They lack access to fresh drinking water.
Seabirds have specialised nasal salt glands found in just above their eyes which is used for drinking seawater and secreting excess ions. This makes them well adapted to life in a marine habitat.
