True because even just typing on a keyboard requires your brain to send the right signals to each individual muscle in your shoulders upper arms forearms and fingers so that you can type
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The correct answer is C) carboxysomes
Carboxysomes are polyhedral inclusion bodies that contain enzyme ribulose- 1,5-bisphosphate carboxylase/oxygenase (RuBisCO). This is responsible for the fixation of carbon dioxide in cyanobacteria. Carboxysomes have evolved as a consequence of the increase in oxygen concentration in the ancient atmosphere.
Thus, <em>carboxysomes are not energy reserves</em>, unlike another offered answers.
The answer osteoarthritis which is degenerative arthritis . It is the leading cause of disability in America. An infection or injury to the joints can exacerbate this natural breakdown of cartilage tissue. Joint pain, stiffness, and swelling are the most common symptoms of arthritis.
Answer:The above statement is "false".
Explanation:
The following events take place during contraction-relaxation of a muscle:
•Action potential in T tubule activates voltage-sensitive receptors,which in turn trigger Ca ions release from terminal cisternae of sacroplasmic reticulum(SR) into cystol.
•Ca ions bind to troponin;troponin changes shape,removing the blocking action of tropomyosin;actin active sites is exposed.
•CONTRACTION; myosin heads alternatively attach to actin and detach,pulling the actin filaments toward the center of the sarcomere;using ATP in this process.
•removal of Ca ions by active transport into the SR after the action potential ends.
•RELAXATION occurs.Actin and myosin return back to its unbound state.
