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What structure is part of a muscle cells membrane that delivers signals to sarcomere?
The transverse (T) tubules are structures in a muscle cell's membrane that deliver signals from the cell surface to the sarcomeres, which are the contractile units of the muscle cell. These T-tubules help coordinate muscle contraction by allowing the signal for muscle contraction to penetrate deeply into the cell.
Enlarged portion of sarcoplasmic reticulum on either side of a transverse tubule?
The enlarged portion of sarcoplasmic reticulum on either side of a transverse tubule is called a terminal cisterna. These terminal cisternae play a vital role in the excitation-contraction coupling of skeletal muscle cells. They store and release calcium ions, which are essential for muscle contraction.
What creates a Na concentration gradient in the proximal tubule?
The Na concentration gradient in the proximal tubule is created by Na+/K+-ATPase pumps on the basolateral membrane actively pumping Na+ out of the cell, generating a low intracellular Na+ concentration. This drives passive reabsorption of Na+ from the lumen of the tubule into the cell down its electrochemical gradient.
Does the proximal convulted tubule secrete drugs?
Yes, the proximal convoluted tubule is involved in drug secretion. It actively transports a wide range of drugs and their metabolites from the bloodstream into the tubule lumen for excretion in the urine. This process plays a crucial role in drug elimination from the body.
What is the primitive stem cell of spermatogenesis which is found on the periphery of each seminiferous tubule called?
The primitive stem cell of spermatogenesis found on the periphery of each seminiferous tubule is called spermatogonia. Spermatogonia is an undifferentiated male germ cell.
ARE THE lumen surfaces of the tubule cells within the proximal convoluted tubule are covered with micro villi?
yes
Is it true that lumen surfaces of the tubule cells within the proximal convoluted tubule ae covered with microvilli?
yes, it's true
Membranous channel extending inward from muscle fiber membrane?
transverse (T) tubule
The difference in charge across the apical side of a renal tubule cell and the lumen is known as?
TEPD- transepithelial potential difference
What structure is part of a muscle cells membrane that delivers signals to sarcomere?
The transverse (T) tubules are structures in a muscle cell's membrane that deliver signals from the cell surface to the sarcomeres, which are the contractile units of the muscle cell. These T-tubules help coordinate muscle contraction by allowing the signal for muscle contraction to penetrate deeply into the cell.
The skeletal muscle complex known as the triad consists of what?
one transverse tubule and two terminal cisternae
Enlarged portion of sarcoplasmic reticulum on either side of a transverse tubule?
The enlarged portion of sarcoplasmic reticulum on either side of a transverse tubule is called a terminal cisterna. These terminal cisternae play a vital role in the excitation-contraction coupling of skeletal muscle cells. They store and release calcium ions, which are essential for muscle contraction.
What creates a Na concentration gradient in the proximal tubule?
The Na concentration gradient in the proximal tubule is created by Na+/K+-ATPase pumps on the basolateral membrane actively pumping Na+ out of the cell, generating a low intracellular Na+ concentration. This drives passive reabsorption of Na+ from the lumen of the tubule into the cell down its electrochemical gradient.
Does the proximal convulted tubule secrete drugs?
Yes, the proximal convoluted tubule is involved in drug secretion. It actively transports a wide range of drugs and their metabolites from the bloodstream into the tubule lumen for excretion in the urine. This process plays a crucial role in drug elimination from the body.
Reabsorption of filtered glucose from the lumen in the PCT is largely by means of?
Reabsorption of filtered glucose from the lumen in the proximal convoluted tubule (PCT) is largely by means of the sodium-glucose cotransporter 2 (SGLT2). This transporter is responsible for actively transporting glucose and sodium from the renal tubule back into the bloodstream. The glucose is then further passively reabsorbed through the facilitative glucose transporter 1 (GLUT1) in the PCT cells.
What is concretion of the prostate?
Concretions are calcified secretions seen in the glandular lumens of older men.
What type of epithelium is found in the lumen of the urethra?
simple squamous
