Lymph is conveyed from the tissues to the venous bloodstream via the lymphatic vessels. ... Pressure within the walls of lymph vessels is lower than that in blood vessels. Lymph flows more slowly than blood. Hope It Helped
Answer:A. The release of calcium ions causes myosin and actin to attach to each other.
The contraction of skeletal muscles takes place by induction of a nerve impulse, which produces a movement and the interaction of the filaments containing proteins named as actin and myosin. This interaction of filaments is regulated by proteins called tropomyosin and troponin present on the actin filaments. The motor nerve causes the depolarization of the muscle membrane sarcolemma. This triggers the sarcoplasmic reticulum to release calcium ions. This calcium binds to troponin and thus allows the tropomyosine strand on the actin filament to displace so that the part of the actin where myosine head needs to be attached remain uncovered. Binding of the actin myosine filament results in contraction.
Hence, the release of calcium ions causes myosin and actin to attach to each other causes muscle contraction.
Answer:
The 5' cap is added to the mRNA as a means of protection from being degraded by enzymes in the cellular environment. Additionally. it helps with binding to the ribosome and subsequently translating it into a protein.
Explanation:
Moreover, it's only Polymerase II that has the ability to add the 5' cap and rRNA & tRNA are not transcribed by Polymerase II, only the mRNA is.
rRNA and tRNA have stable 3-Dimensional structures that protects it from being degraded by enzymes.
Hope that answers the question, have a great day!
Answer:
The relationship between photosynthesis and cellular respiration is such that the products of one system are the reactants of the other.
Explanation:
For example, the output of photosynthesis is the input of glucose production or cellular respiration. The output of glucose production is the input of photosynthesis. Photosynthesis involves the use of energy from sunlight, water, and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water. To emphasize this point, even more, the equation for photosynthesis is the opposite of cellular respiration.
