What organelle is most common in muscle cells?
What organelle is abundant in nerve cells?
Which organelle is most likely to be found in high concentrations in muscle cells?
What do skeletal muscle cells have more of than other cells?
Skeletal muscle cells form elongated fibers in the body. They have multiple nuclei within each cell. This contrasts with the majority of other cells in human bodies. They also contain many mitochondria, cellular organelles that produce adenosine triphosphate (ATP), the body’s fuel.
What organelle is important in muscle contraction?
Organelles in Muscle Tissue Numerous mitochondria are found in each muscle cell to provide metabolic energy for muscle contraction.
What is a muscle striation?
: muscle tissue that is marked by transverse dark and light bands, is made up of elongated usually multinucleated fibers, and includes skeletal muscle, cardiac muscle, and most muscle of arthropods — compare smooth muscle, voluntary muscle.
What cell is a muscle cell?
What are the adaptations of muscle cells?
Many cells are specialised. 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.
What are the adaptations of nerve cells?
they have a long fibre (axon ) so they can carry messages up and down the body over long distances. in a stimulated neuron, an electrical nerve impulse passes along the axon. the axon is insulated by a fatty (myelin) sheath – the fatty sheath increases the speed of the nerve impulses along the neuron.
What are the adaptations of phloem cells?
The cells that make up the phloem are adapted to their function:
- Sieve tubes – specialised for transport and have no nuclei. Each sieve tube has a perforated end so its cytoplasm connects one cell to the next.
- Companion cells – transport of substances in the phloem requires energy.
What is a muscle cell function?
Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion. There are three types of muscle, skeletal or striated, cardiac, and smooth.
What is most important muscle in body?
The human heart is the most incredible muscle in the body, beating about 100,000 times to send 3,600 gallons of blood through 75,000 miles of blood vessels each day. Sure, skeletal muscles are vital to our ability to function, but the heart is truly a step above.
What muscle moves the tongue?
The genioglossus arises from the mandible and protrudes the tongue. It is also known as the tongue’s “safety muscle” since it is the only muscle that propels the tongue forward. The hyoglossus, arises from the hyoid bone and retracts and depresses the tongue. The chondroglossus is often included with this muscle.
Which nerve supply the tongue?
The hypoglossal nerve (CN XII) provides motor innervation to all of the intrinsic and extrinsic muscles of the tongue except for the palatoglossus muscle, which is innervated by the vagus nerve (CN X).
What animals don’t have a tongue?
Taste sensations Other animals naturally have no tongues, such as sea stars, sea urchins and other echinoderms, as well as crustaceans, says Chris Mah via email. Mah is a marine invertebrate zoologist at the Smithsonian National Museum of Natural History and has discovered numerous species of sea stars.
Which is the most dangerous tongue?
Without teeth, the giant anteater’s tongue does double duty—it’s spiny, which helps it grab insect prey, and its sticky saliva traps its victims against the roof of the mouth, where they’re crushed before being swallowed, according to the University of Edinburgh.
Which animal does not have brain?