* Only 1 word can go in each blank. 1. The arcuate artery and the arcuate vein m
ID: 3481723 • Letter: #
Question
* Only 1 word can go in each blank.
1. The arcuate artery and the arcuate vein mark the border between what two regions of the kidney? _____ _____
2. What hormone is associated with calcium homeostasis and causes reabsorption of the ion from renal tubules? (use the abbreviation)? _____
3. In the "holding it" reflex, the sympathetic system causes relaxation of the _____ muscle and contraction of the _____ _____ _____.
4. In the nephrons of the kidneys, _____ takes place at the glomerulus and ______ occurs in the proximal convoluted tubule.
5. Low blood pressure results in a drop in glomerular filtration rate, which the kidney corrects by DILATING the _____ arteriole.
Explanation / Answer
1 kidney is supplied by the renal artery which is derived from the abdominal artery
the renal veins drain the blood from the kidney to the inferior vena cava
both the arcuate artery and vein marks the border of renal cortex and renal medulla.
2. calcium homeostasis is necessary to maintain balance in the body
calcium homeostasis mainly occurs at the bone and the kidney
PTH is secreted through parathyroid gland
PTH is the hormone responsible for the reabsorption of calcium from the
renal tubules with magnesium ions and hydrogen
ions. It mainly acts on distal convoluted tubule and PCT for calcium reabsorption.
3. the micturition or voiding the urine can be voluntarily hold or avoided which is known as holding reflex.
During normal micturition parasympathetic stimulation cause contraction of detrusor muscle and relaxation of internal and external urethral sphincter
In holding reflex, the sympathetic stimulation cause relaxation of detrusor muscle and contraction of external urethral sphincter
4. Glomerulus is tuft of capillaries present in the nephron of the kidney. THe blood blood passing through these capillaries get filtered and is passed on to the renal tubules.
proximal convoluted tubule is the part of the renal tubule which starts from the ending of bowmanns capsule.
It causes reabsorption of useful ions from the filtered blood coming from the glomerulus
In the nephrons of the kidneys, filteration takes place at the glomerulus and reabsorption occurs in the proximal convoluted tubule.
5. Hypotension resuls in low blood flow to the kidney resulting in low GFR.
afferent arterioles dilatation cause increase in renal blodd flow and increase in BP while constriction causes the reverse.
Low blood pressure results in a drop in glomerular filtration rate, which the kidney corrects by DILATING the afferent arteriole.
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