50295 + Interview Questions in Secondary School in Biology

1.	How many gram of potassium is there in 10 years old's body??
Answer» Answer: plz mark me as brainliest answer and follow me Guys ...... Explanation: Potassium is present in all body tissues and is REQUIRED for normal cell function because of its role in maintaining intracellular fluid volume and transmembrane electrochemical gradients [1,2]. Potassium has a strong relationship with sodium, the main regulator of extracellular fluid volume, including plasma volume. The total amount of potassium in the ADULT body is about 45 millimole (mmol)/kg body weight (about 140 G for a 175 pound adult; 1 mmol = 1 milliequivalent [mEq] or 39.1 mg potassium) [3]. Most potassium resides intracellularly, and a small amount is in extracellular fluid [2-4]. The intracellular concentration of potassium is about 30 times higher than the extracellular concentration, and this difference forms a transmembrane electrochemical GRADIENT that is maintained via the sodium-potassium (Na+/K+) ATPase transporter [4]. In addition to maintaining cellular tonicity, this gradient is required for proper nerve transmission, muscle contraction, and kidney function. Potassium is absorbed via PASSIVE diffusion, primarily in the small intestine [2,4,5]. About 90% of ingested potassium is absorbed and used to maintain its normal intracellular and extracellular concentrations [3,5]. Potassium is excreted primarily in the urine, some is excreted in the stool, and a very small amount is lost in sweat. The kidneys control potassium excretion in response to changes in dietary intakes, and potassium excretion increases rapidly in healthy people after potassium consumption, unless body stores are depleted [2,6]. The kidneys can adapt to variable potassium intakes in healthy individuals, but a minimum of 5 mmol (about 195 mg) potassium is excreted daily in urine [3]. This, combined with other obligatory losses, suggests that potassium balance cannot be achieved with intakes less than about 400–800 mg/day.

1.

How many gram of potassium is there in 10 years old's body??

Answer»

Answer:

plz mark me as brainliest answer and follow me Guys ......

Explanation:

Potassium is present in all body tissues and is REQUIRED for normal cell function because of its role in maintaining intracellular fluid volume and transmembrane electrochemical gradients [1,2]. Potassium has a strong relationship with sodium, the main regulator of extracellular fluid volume, including plasma volume.

The total amount of potassium in the ADULT body is about 45 millimole (mmol)/kg body weight (about 140 G for a 175 pound adult; 1 mmol = 1 milliequivalent [mEq] or 39.1 mg potassium) [3]. Most potassium resides intracellularly, and a small amount is in extracellular fluid [2-4]. The intracellular concentration of potassium is about 30 times higher than the extracellular concentration, and this difference forms a transmembrane electrochemical GRADIENT that is maintained via the sodium-potassium (Na+/K+) ATPase transporter [4]. In addition to maintaining cellular tonicity, this gradient is required for proper nerve transmission, muscle contraction, and kidney function.

Potassium is absorbed via PASSIVE diffusion, primarily in the small intestine [2,4,5]. About 90% of ingested potassium is absorbed and used to maintain its normal intracellular and extracellular concentrations [3,5]. Potassium is excreted primarily in the urine, some is excreted in the stool, and a very small amount is lost in sweat. The kidneys control potassium excretion in response to changes in dietary intakes, and potassium excretion increases rapidly in healthy people after potassium consumption, unless body stores are depleted [2,6]. The kidneys can adapt to variable potassium intakes in healthy individuals, but a minimum of 5 mmol (about 195 mg) potassium is excreted daily in urine [3]. This, combined with other obligatory losses, suggests that potassium balance cannot be achieved with intakes less than about 400–800 mg/day.

2.	Define fossil. Explain importanof fossils as proof of evolution. please tell correct answer , urgent wrong answer will be reported
Answer» Fossils are the PRESERVED remains or traces of animals, plants, and other organisms from the PAST. Fossils are important evidence for evolution because they show that life on EARTH was once different from life found on earth TODAY.

35.	Are there any glands in the vagina?
Answer» The BARTHOLIN's glands are located on each side of the VAGINAL opening. They secrete fluid that helps lubricate the vagina. Sometimes the ducts of these glands BECOME OBSTRUCTED and fluid backs up, forming a cyst. The Bartholin's (BAHR-toe-linz) glands are located on each side of the vaginal opening.

42.	What are the rungs of the “DNA ladder” madeof?
Answer» Dear Customer , u NEED to activate ZEE news app by,tata sky app and ,u can see D.N.A OKAY

46.	Explain the peculiarities of materials ?
Answer» State of matter: solid, liquid, gas, plasma etc. Physical PROPERTIES LIKE density, melting POINT etc. Mechanical properties like HARDNESS, strength, brittleness or DUCTILITY etc.

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