Answer:
v = πr²h
v = 3.142*4²*6
v = 301.71cm³
Explanation:
volume of the cylinder = πr²h
Answer:
FALSE
Explanation:
Papillary muscles are found in the bottom chambers of the heart and attaches to the tricuspid and bicuspid valve through tendons to facilitate blood flow during systole. It also prevent prolapse. These muscles contract before the contraction of ventricular muscles (or before the contraction of ventricles) by pulling chordae tendinae till the ventricles are relaxed. This helps in preparing the valves for high ventricular pressure
Hence, the given statement is false
The ciliary muscles behind the iris shape the lens by pulling the choroid up and relaxing the suspensory ligaments. The ciliary muscle changes the shape of the lens within the eye, not the size of the pupil which is carried out by the spincter pipillae muscle and dilator pupillae. When the ciliary muscle is relaxed, the choroid acts like a spring pulling on the lens via the zonule fibers causing the lens to flatten, and when the muscle contracts, it stretches the choroid, releasing the tension on the lens and thus they become thicker.
The answer to this question would be because phospholipid is polar has <span>a </span>charge.
Since phospholipid is polar, it can attract molecule with a charge. That will cause the molecule cant move easily pass the membrane. The hydrophobic molecule doesn't have charge, so the molecule can pass through the phospholipid membrane if it small enough.