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الحمد لله حمد الشاكرين🍀😊
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⭕تنبيه⭕ :
🚨 بخصوص امتحان الفسلجة (النظري) الفاينل
🔴 ستكون عبارة عن ﴿75﴾ نقطة
🔹 ﴿50﴾ نقطة MCQ
🔹 ﴿25﴾ نقطة T/F
🔸 الإجابة عن ﴿70﴾ الترك بإختيار الطالب سواء من MCQ او T/F
🔴 ستكون ال MCQ على ثلاث خيارات
[ A - B -C ]
🔴 بخصوص الإختيارات يجب على الطالب حفظ الإجابة نصا وليس حفظ (الحرف) لانه
🔸 سيكون هناك تغيير (يعني مثلا اذا جان جواب الإختيار بالملف ممكن يجي بالامتحان
🔸 ممكن ان تكون هناك اكثر من إجابة صحيحة ويضع كلمة {all of the above}
🔸 ممكن ألا تكون هناك إجابة صحيحة ويضع كلمة {none of the above}
🔸 ممكن يبدل بالصح والخطأ ( يعني ممكن يخلي الصح والخطأ والخطأ صح
🟢 لذلك على الطالب أن يقرأ بتركيز وحذر
ذني يفيدن للمراجعه خاصات بمحاظرة الهرمونات الجزئين والكيميائية الاكتروليتهية اخر محاظرة
محاظرة الكيمياءية والاكترولايت المحاظرة الاخيرة
Multiple Choice Questions (MCQs):
1. Which ion is the major extracellular cation?
a) K⁺ b) Mg²⁺ c) Na⁺ d) Cl⁻
Answer: c) Na⁺
2. The primary function of parathyroid hormone (PTH) is to regulate:
a) Potassium levels b) Sodium levels c) Chloride levels d) Calcium levels
Answer: d) Calcium levels
3. Which of the following is NOT a major function of potassium (K⁺)?
a) Maintaining membrane potential b) Muscle contraction c) Blood clotting d) Enzymatic reactions
Answer: c) Blood clotting
4. The bicarbonate buffer system is primarily involved in:
a) Maintaining blood pressure b) Regulating blood pH c) Transporting oxygen d) Glucose metabolism
Answer: b) Regulating blood pH
5. Which transporter is crucial for sodium reabsorption in the distal tubule, regulated by aldosterone?
a) SGLT transporters b) Na⁺/K⁺-ATPase pump c) Sodium-glucose cotransporter d) It's not specified in the text
Answer: b) Na⁺/K⁺-ATPase pump (While SGLT transporters are involved with sodium, the question specifically asks about the distal tubule and aldosterone regulation.)
6. A deficiency in magnesium can lead to:
a) Hypocalcemia b) Hyperkalemia c) Neuromuscular hyperexcitability d) Metabolic acidosis
Answer: c) Neuromuscular hyperexcitability
7. Which condition is characterized by excessive water intake leading to low sodium levels?
a) Hypernatremia b) Hypokalemia c) Hyponatremia d) Hypercalcemia
Answer: c) Hyponatremia
8. The chloride shift (Hamburger phenomenon) is primarily involved in:
a) Glucose transport b) CO₂ transport c) Potassium regulation d) Calcium homeostasis
Answer: b) CO₂ transport
9. Which hormone promotes cellular uptake of potassium and glucose?
a) Aldosterone b) Parathyroid hormone c) Insulin d) Antidiuretic hormone
Answer: c) Insulin
10. What is the primary function of phosphate (HPO₄²⁻ / H₂PO₄⁻) in the body?
a) Maintaining blood pressure b) Component of the bicarbonate buffer system c) Synthesis of ATP and nucleotides d) Regulation of blood clotting.
Answer: c) Synthesis of ATP and nucleotides
True/False Questions:
1. True or False: Sodium is the major intracellular cation. Answer: False
2. True or False: Hyperkalemia is associated with an excess of potassium in the blood. Answer: True
3. True or False: Hypocalcemia can lead to muscle weakness and tetany. Answer: True
4. True or False: Aldosterone primarily regulates potassium levels. Answer: False (While it does affect potassium, its primary role is sodium regulation).
5. True or False: The Henderson-Hasselbalch equation describes the equilibrium of the bicarbonate buffer system. Answer: True
6. True or False: Metabolic acidosis is often associated with hypokalemia. Answer: False (It's associated with hyperkalemia).
7. True or False: Antidiuretic hormone (ADH) increases water excretion, leading to increased sodium concentration. Answer: False (ADH increases water retention, decreasing sodium concentration).
8. True or False: Magnesium is an important cofactor for many enzymatic reactions. Answer: True
9. True or False: Chloride ions play a critical role in gastric acid production. Answer: True
10. True or False: Renal regulation is the sole mechanism for maintaining electrolyte balance. Answer: False (Hormonal and cellular mechanisms are also crucial).
محاظرة الهرمونات الجزء الثاني التكمله
Multiple Choice Questions (MCQs):
1. Which gland is often referred to as the "master gland"?
a) Thyroid gland b) Adrenal gland c) Pituitary gland d) Pancreas
Answer: c) Pituitary gland
2. The thyroid gland is located:
a) In the brain b) Behind the stomach c) In the neck, below the larynx d) On top of the kidneys
Answer: c) In the neck, below the larynx
3. Which hormone does the adrenal medulla primarily secrete?
a) Steroid hormones b) Insulin c) Catecholamines d) Calcitonin
Answer: c) Catecholamines
4. The parathyroid glands primarily regulate levels of:
a) Blood sugar b) Metabolism c) Calcium d) Sleep-wake cycles
Answer: c) Calcium
5. The pancreas's endocrine function primarily involves:
a) Digestion b) Blood sugar regulation c) Immune support d) Reproductive development
Answer: b) Blood sugar regulation
6. The pineal gland is involved in regulating:
a) Metabolism b) Calcium levels c) Sleep-wake cycle d) Blood pressure
Answer: c) Sleep-wake cycle
7. Which gland is most active during childhood and supports the immune system?
a) Thyroid gland b) Thymus gland c) Pineal gland d) Adrenal gland
Answer: b) Thymus gland
8. The gonads are also known as:
a) Adrenal glands b) Reproductive glands c) Salivary glands d) Sweat glands
Answer: b) Reproductive glands
9. The placenta is a temporary gland found:
a) In the brain b) In the scrotum c) In the uterus d) Behind the stomach
Answer: c) In the uterus
10. Which of the following is NOT a division of the adrenal gland?
a) Adrenal Cortex b) Adrenal Medulla c) Adrenal Parietal d) None of the above
Answer: c) Adrenal Parietal
True/False Questions:
1. The pituitary gland is located at the base of the brain. True
2. The adrenal cortex secretes catecholamines. False (It secretes steroid hormones)
3. The parathyroid glands help regulate metabolism. False (They regulate calcium levels)
4. The pancreas has both endocrine and exocrine functions. True (The text only mentions endocrine, but it's true)
5. The pineal gland is involved in regulating blood pressure. False (It regulates the sleep-wake cycle)
6. The thymus gland is more active in adulthood than in childhood. False (It's more active in childhood)
7. The ovaries are the female gonads. True
8. The testes are the male gonads. True
9. The placenta is a permanent gland. False (It's temporary, during pregnancy)
10. The thyroid gland regulates calcium balance. True (Along with metabolism)
محاظرة الهرمونات الجزء الاول
Multiple Choice Questions (MCQs):
1. Which of the following is NOT a characteristic of peptide hormones?
a) Composed of amino acids b) Lipid-soluble c) Water-soluble d) Act via membrane-bound receptors
Answer: b) Lipid-soluble
2. Steroid hormones are derived from:
a) Tyrosine b) Tryptophan c) Cholesterol d) Amino acids
Answer: c) Cholesterol
3. Which hormone acts via intracellular receptors?
a) Insulin b) Epinephrine c) Cortisol d) Glucagon
Answer: c) Cortisol
4. Catecholamines are:
a) Lipid-soluble and act via intracellular receptors b) Water-soluble and act via membrane-bound receptors c) Lipid-soluble and act via membrane-bound receptors d) Water-soluble and act via intracellular receptors
Answer: b) Water-soluble and act via membrane-bound receptors
5. Peptide hormones are synthesized as:
a) Active hormones b) Prohormones c) Preprohormones d) Apohormones
Answer: c) Preprohormones
6. Water-soluble hormones are transported in the blood:
a) Bound to carrier proteins b) Freely circulating c) Stored in vesicles d) Only in the lymphatic system
Answer: b) Freely circulating
7. Which of the following is a type of cell surface receptor?
a) Intracellular receptor b) G protein-coupled receptor (GPCR) c) Nuclear receptor d) Cytosolic receptor
Answer: b) G protein-coupled receptor (GPCR)
8. Receptor tyrosine kinases (RTKs) activate:
a) Second messengers only b) Intracellular signaling pathways c) Gene expression directly d) Protein degradation
Answer: b) Intracellular signaling pathways
9. The liver plays a major role in:
a) Hormone synthesis b) Hormone receptor production c) Hormone metabolism d) Hormone storage
Answer: c) Hormone metabolism
10. The primary mechanism of action for lipid-soluble hormones involves:
a) Direct activation of enzymes b) Regulation of gene expression c) Activation of second messenger systems d) Direct alteration of membrane permeability
Answer: b) Regulation of gene expression
True/False Questions:
1. All hormones are water-soluble. False
2. Steroid hormones easily cross cell membranes. True
3. Thyroid hormones act via membrane-bound receptors. False
4. Hormones are released only in response to neural signals. False
5. Lipid-soluble hormones circulate freely in the blood. False
6. G protein-coupled receptors utilize second messengers. True
7. Intracellular receptors are found on the cell membrane. False
8. The kidneys excrete hormone metabolites. True
9. Enzymatic degradation is involved in hormone inactivation. True
10. Hormone degradation is not essential for maintaining homeostasis. False
🚨 محاضرات الكيمياء (النظري) الداخلة في الامتحان < كلهن >
