The defecation reflex involves two postive feedback loops. these loops are the stretch receptors in the rectal walls and the sacral parasympathetic system. Defecation reflex empties the rectum by peristaltic movements push fecal matter from the sigmoid colon into the rectum. Then this distension of the rectal walls stimulates stretch receptors which results in defecation.
Answer:
Trees will compete with shrubs for light and space so by adapting for increased flammability, chaparral scrubs promote natural wildfires to eliminate their competitors. While these fires destroy the trees, the shrubs are still able to germinate afterwards.
Explanation:
Answer: As each cell differentiates, the <em>DNA </em>changes so that each type of cell has different <em>DNA</em> once it reaches maturity. Mutations in the cells’ nuclei lead to new combinations of <em>DNA</em>, resulting in different shapes and functions in the different types of cells.
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The acetabulum is a fossa formed by the ilium, ischium and pubis which with the femoral head forms the coxal joint.
The acetabulum is made up of the three bones that make up the coxal bone (hip bone).
The ischium, which offers the lower and side limits to the acetabulum, makes up somewhat more than two-fifths of the structure.
Less than two-fifths of the acetabulum's structure is provided by the ilium, which also serves as the top limit of the joint.
The pubis, which is close to the midline, forms the remainder.
The acetabulofemoral joint (art. coxae), also known as the coxal joint, is the joint between the head of the femur and the acetabulum of the pelvis.
Its main job is to support the weight of the body in both static (such as while standing) and dynamic (such as when walking or running) postures.
Learn more about Hip joint here brainly.com/question/12522711
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Answer:
The four organelles that contribute to the synthesis, transport, packaging, and export of proteins to the extracellular environment are Nucleus, RIBOSOMES, rough endoplasmic recticulum and Golgi apparathus.
Explanation:
The nucleus is the organelle that produced RIBOSOMES.
RIBOSOMES are organelles responsible for protein synthesis production of proteins.
The protein produced by the RIBOSOMES are then gathered in the rough endoplasmic recticulum . It then export and transport the protein to Golgi apparatus. The Golgi apparatus modifies and package the protein.
