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What substance is released by the nervous system and excites muscle cells?
Acetylcholine is the neurotransmitter released by the nervous system that excites muscle cells, leading to muscle contraction.
What organelle makes steriods in gland cells regulates calcium in muscle cells and break down toxins in liver cells?
The endoplasmic reticulum (smooth ER) is the organelle that makes steroids in gland cells, regulates calcium in muscle cells, and breaks down toxins in liver cells. It is involved in lipid synthesis, calcium storage, and detoxification processes in various cell types.
Where are the calcium ions stored in the muscle cells?
terminal cisternae of the sarcoplasmic reticulum
What organelle synthesizes steroids in the ovary and stores calcium in muscle cells?
Smooth ER
What does calcium pumps do?
Calcium pumps are membrane proteins that actively transport calcium ions (Ca²⁺) out of cells or into the sarcoplasmic reticulum in muscle cells, maintaining calcium homeostasis. They play a crucial role in various physiological processes, such as muscle contraction, neurotransmitter release, and cellular signaling. By regulating intracellular calcium levels, these pumps ensure that calcium is available when needed while preventing excessive accumulation, which could be harmful to the cell.
Do t tubules play a role in storing calcium within muscle cells?
Yes, T-tubules play a role in storing calcium within muscle cells by helping to facilitate the release of calcium from the sarcoplasmic reticulum during muscle contraction.
What is a calcium channel blocker?
Calcium channel blockers are medicines that slow the movement of calcium into the cells of the heart and blood vessels.
Which organelle contains calcium in muscle cells?
sarcoplasmic reticulum
Why is calcium essential for muscle contraction?
Calcium is essential for muscle contraction because it triggers the proteins in muscle cells to interact and generate the force needed for muscle movement. Without calcium, the muscles would not be able to contract effectively.
What structure in skeletal mucle cells functions in calcium storage?
The structure within skeletal muscle cells responsible for calcium storage is the sarcoplasmic reticulum. It stores and releases calcium ions, which are crucial for muscle contraction and relaxation. When a muscle cell receives a signal to contract, calcium is released from the sarcoplasmic reticulum, allowing the muscle to shorten and generate force.
What substance is released by the nervous system and excites muscle cells?
Acetylcholine is the neurotransmitter released by the nervous system that excites muscle cells, leading to muscle contraction.
When a muscle is relaxed calcium levels are high in?
When a muscle is relaxed, calcium levels are low inside the muscle cells due to active transport mechanisms that store calcium in the sarcoplasmic reticulum. This low calcium level prevents muscle contraction as it is needed for the binding of actin and myosin during muscle contraction.
What organelle makes steriods in gland cells regulates calcium in muscle cells and break down toxins in liver cells?
The endoplasmic reticulum (smooth ER) is the organelle that makes steroids in gland cells, regulates calcium in muscle cells, and breaks down toxins in liver cells. It is involved in lipid synthesis, calcium storage, and detoxification processes in various cell types.
What is the organelle that stores calcium in resting muscle cells?
The organelle that stores calcium in resting muscle cells is the sarcoplasmic reticulum. Calcium ions are released from the sarcoplasmic reticulum during muscle contraction to trigger muscle activity.
A protein that binds the calcium in smooth muscle?
Calmodulin is a protein that binds calcium ions in smooth muscle cells. When calcium binds to calmodulin, it triggers a series of intracellular signaling events that lead to smooth muscle contraction.
What chemical triggers sliding of muscle filaments?
The chemical that triggers the sliding of muscle filaments is calcium ions. When muscle cells receive a signal to contract, calcium ions are released into the muscle cell, binding to specific proteins and initiating the sliding mechanism between actin and myosin filaments in the muscle cells.
What is calcium channel blockers?
A calcium channel blocker is a drug that lowers blood pressure by either preventing calcium from entering cells of the cardiac muscle, or the smooth muscle cells of the blood vessel walls.
