The answer is; A
When an impulse from the motor neuron reached the neuromuscular junction, the voltage-dependent calcium channels are activated and the neurotransmitter released from the presynaptic cleft. When the neurotransmitter binds to their receptors on the sarcolemma, the muscle fibers become depolarised; the calcium is released from their vesicles. The Ca2+ ions are important in the power stroke because they bind to troponin. Upon binding calcium, troponin moves tropomyosin away from the myosin-binding sites on actin. Powered by the energy from ATP molecule, the myosin is able to bind on the actin and slides over the actin filament.
Answer:
d) A and B above.
Explanation:
Triacylglycerols are the simplest form of lipids comprised of fatty acids. Triacylglycerols are also called as fats or neutral fats. Each molecule of triacylglycerol is composed of three fatty acids bonded to the single glycerol molecule.
Each of the three fatty acids of triacylglycerol is bonded to glycerol in an ester linkage. The main function of triacylglycerols is to serve as energy storage form and provide insulation to eukaryotic cells.
The main things the WWF is doing with regard to circle hooks are supporting innovation and educating people.
Circle hooks help to reduce sea turtle deaths by up to 90%. The WWF has encouraged the elimination of tariffs on these hooks, and funds for further innovation for safer hooks. It has also led education initiatives to inform individuals, industries, and governments of the dangers of J-shaped hooks.
Answer:
zebras,spingbok, rabbit
Explanation:
the hunters of this prey would be :hyenas ,lions, cheetahs