Answer:
Concentric muscle contraction (shortening): In weight training, this is the lifting phase of an exercise. ...
Eccentric muscle contraction (lengthening): In weight training, this is the phase in which the muscle returns to the starting position of the exercise.
our muscles are made of bundles of muscle fibers that contain thousands of smaller structures called myofibrils, where the actual contraction occurs. There are two types of protein filaments within myofibrils—actin and myosin. Actin forms thin filaments. Myosin forms thick filaments and is a "molecular motor" that converts chemical energy into mechanical energy, which creates force and drives motion.
Explanation:
Simple columnar epithelium.
A single layer of tall, thin columnar epithelial cells with oval-shaped nuclei situated in the basal area and connected to the basement membrane makes up simple columnar epithelium.
The majority of the human digestive tract's organs, including the stomach and intestines, are lined by simple columnar epithelium. Non-keratinized stratified squamous epithelium makes up the esophagus.
Keep in mind that connective tissue papillae have the ability to puncture the basal surface of the epithelium rather deeply. The connective tissue papillae may appear to be "islands" in an oblique slice through the epithelium, as though they were encircled by epithelium. Many beginning students mistake them for glandular structures.
Here's another question with an answer similar to this about Simple squamous epithelium: brainly.com/question/28206843
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Answer:
Just put what you believe from this info
Explanation:
The Black Death is estimated to have killed 30% to 60% of Europe's population. In total, the plague may have reduced the world population from an estimated 475 million to 350–375 million in the 14th century.
