Answer:
d. left ventricle
Explanation:
Heart consists of four chambers: left atrium, right atrium, left ventricle and right ventricle. The atria are located above the ventricles and their function is to pump blood to the ventricles.
Right ventricle pumps the deoxygenated blood to the lungs via pulmonary artery. Pulmonary vein brings back oxygenated blood from lungs to the left atrium. From here the blood is sent to left ventricle. Left ventricle pumps blood to the entire body via aorta. Since it has to make blood reach to every part of the body from head to toes, it generates maximum pressure. Therefore, left ventricle also has thickest heart muscles.
Answer: B) muscularis mucosa
Explanation:
The digestive wall which is responsible for most of its movement are muscularis mucosa as, the muscularis mucosa is the outer layer and it is the thin layer which is responsible for generating the movement in smooth muscles. Basically, smooth muscle are responsible for generating the move and fold which help in increasing absorptive mucosa area. And it is supported by the thin layer of the connective tissues.

===========================================
Answer:
Pyruvate it turns into lactate almost immediately.
Explanation:
The anaerobic glycolytic system has 10 steps but they happen very fast. The end product is pyruvate but it turns into lactate almost immediately. Pyruvate turns into lactate so quickly that some refer to this system as the lactic or lactate system.