Table of Contents
How are muscle cells adapted to release a lot of energy?
Muscle cells contain filaments of protein that slide over each other to cause muscle contraction. The arrangement of these filaments causes the banded appearance of heart muscle and skeletal muscle. They contain many well-developed mitochondria to provide the energy for muscle contraction.
How are muscles cells adapted to their function?
They have structures that are adapted for their function. For example, muscle cells bring parts of the body closer together. They contain protein fibres that can contract when energy is available, making the cells shorter.
Why are muscles needed in the intestine?
The large, hollow organs of the digestive tract contain a layer of muscle that enables their walls to move. The movement of organ walls can propel food and liquid through the system and also can mix the contents within each organ. Food moves from one organ to the next through muscle action called peristalsis.
What is the function of the muscle cells in the stomach wall?
Food is moved through the digestive system by a process called peristalsis . Two sets of muscles in the gut wall are involved: circular muscles – which reduce the diameter of the gut when they contract. longitudinal muscles – which reduce the length of the gut when they contract.
How is a cell wall adapted to its function?
A major role of the cell wall is to form a framework for the cell to prevent over expansion. Cellulose fibers, structural proteins, and other polysaccharides help to maintain the shape and form of the cell. Support: The cell wall provides mechanical strength and support. It also controls the direction of cell growth.
Why might a muscle cell have lots of mitochondria?
Explanation: Muscle cells need energy to do mechanical work and respond quickly. Thus a higher number of mitochondria is present so that the cells requirement of energy to perform its specific function is fulfilled.
Which cells need lots of energy for movement?
Muscle cells contain actin and myosin filaments, which move in such a way that enables the muscle to contract. This process uses chemical energy, derived from ATP being broken down into ADP and phosphate. So the cell needs lots of ATP.
How is the small intestine adapted for absorption?
The small intestines are well adapted for absorbing nutrients during digestion by: being very long, having villi and microvilli that increase surface area, using muscular contractions to move and mix food, and receiving and housing digestive enzymes and bile that help the breakdown of food.
Why does the stomach have muscle cells?
These muscle cells are known as a type of cell called smooth muscle. They serve to contract/shorten regularly in unison in a process known as peristalsis. This allows the food to be mixed with each other, as well as with digestive enzymes to help break it down.
What is released during muscle contraction?
Muscle contraction ends when calcium ions are pumped back into the sarcoplasmic reticulum, allowing the muscle cell to relax. During stimulation of the muscle cell, the motor neuron releases the neurotransmitter acetylcholine, which then binds to a post-synaptic nicotinic acetylcholine receptor.
How are muscle cells in the intestine adapted to release a lot of energy? Respiration, the chemical reaction that releases energy from glucose, happens in mitochondria. Tissues and organs that need a lot of energy have large numbers of mitochondria in their cells.
How does increased blood flow help muscle cells?
Increased blood flow helps muscle cells release more energy. This is because the blood delivers the products needed for the cell to function. How do the muscle cells get the energy needed to make glycogen?
How are sugars and oxygen used in muscle cells?
The blood supply brings food (sugars – glucose) and oxygen to the muscle cells. Inside the muscle cells (in the mitochondria) the sugar is “burned” using the oxygen, to release the chemical energy locked in the sugar. This energy is used to contract the muscle cells when the organism wants to move.