Tag: excretion and osmoregulation

Quizzes (12) Questions (106)

Questions Related to excretion and osmoregulation

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation
Electron transport chain (ETC) is a set of __________ electron carries present in a specific sequence along mitochondrial membrane.

  1. seven, inner

  2. six, inner

  3. seven, outer

  4. six, outer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In electron transport chain, there are 7 electron acceptors, which are as follows $Co-Q\rightarrow Cyt \,b\rightarrow Cyt \,{c} _{1} \rightarrow Cyt \,c\rightarrow Cyt a\rightarrow Cyt \,{a} _{3}\rightarrow{O} _{2}$. Oxygen is the ultimate electron acceptor. These electron acceptors are present in a specific sequence along inner mitochondrial membrane.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

Urine leaves the kidney as

  1. Water

  2. Blood

  3. Interstitial fluid

  4. Tissue fluid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Urine is a liquid excretory product of the body excreted by the kidneys through a process called urination (or micturition) and excreted through the urethra. Urine contains urea and water. A urea is toxic it needs water to be excreted from the body.

So, the correct answer is option A.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

In mammals, the urinary bladder opens into 

  1. Uterus

  2. Urethra

  3. Vestibule

  4. Ureter
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The final passageway for urine out of the bladder is through the thin-walled urethra. This tube runs from the base of the urinary bladder to the outside of the body. In the female, it is relatively short, connecting the bladder to the external urethral sphincter. In males, it is longer. It passes through the prostate gland and travels the length of the penis before reaching the external sphincter. 

So, the correct answer is option B.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

Urine is stored in

  1. Ureter

  2. Kidney

  3. Urinary bladder

  4. Uterus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The blood is filtered by the kidney and the urine is formed. Urinary bladder is the organ that collects urine excreted by the kidneys before disposal by urination. It is a hollow muscular, and distensible (or elastic) organ. Urine enters the bladder via the ureters and exits via the urethra. 

So, the correct answer is option C.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

Largest amounts of nitrogen are excreted through

  1. Sweat

  2. Faeces

  3. Breath

  4. Urine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The urinary system is involved in the excretion of nitrogenous waste products such as urea, uric acid or ammonia. The excretion of nitrogenous waste from animals is important because if it is allowed to build up, it can prove toxic. The waste product is formed due to the breakdown of the amino acids.

So, the correct answer is option D.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

The filling of the urinary bladder essentially requires

  1. Relaxation of detrusor muscle

  2. Contraction of internal sphinet

  3. Stimulation of sympathetic nerve

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The muscular part of the bladder wall is called the detrusor muscle. The internal and external sphincter muscles surround the bladder neck and the urethra. While the bladder is filling, the detrusor muscle is relaxed so the bladder wall can expand, and the sphincter muscles are contracted to keep the urethra closed. Sympathetic stimulation is predominant during bladder filling, and the parasympathetic causes emptying. Thus, option D is correct and other options are wrong.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

The feeling of fullness sensation of urine is marked if the volume of urine increases upto

  1. 200 c.c

  2. 300 c.c

  3. 600 c.c

  4. 1000 c.c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The feeling of fullness sensation of urine is marked if the volume of urine increases up to 600 c.c.

Urination is the release of urine from the urinary bladder through the urethra to the urinary meatus outside of the body. It is also known medically as micturition.
Physiologically, urination involves coordination between the central, autonomic, and somatic nervous systems.In the adult, the volume of urine in the bladder that normally initiates a reflex contraction is about 300–400 millilitres.
Therefore, the correct answer is option C.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

Protein rich diet brings about relatively no change in which one of the following constituents of urine?

  1. Creatinine

  2. Ammonium salt

  3. Urea

  4. Uric acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Urine which is a waste product of the human system is 95% water. Remaining 5% contains urea, uric acid, creatinine, sodium chloride, hormones, carbohydrates, fatty acids, enzymes, mucins and pigments. While diets play a role in the excretory systems, the protein rich diet does not bring in any changes in the uric acid levels in urine.

Therefore, the correct answer is option D.

Multiple choice zoology excretion and osmoregulation micturition urine and urine formation urine formation

After having lunch or dinner one can feel to pass urine, because of the

  1. Stomach pressures on bladder

  2. Solids become liquids

  3. Water content in food material

  4. Spincter relaxation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The feeling to pass urine after a meal is often associated with the increased fluid intake from food and beverages, which increases the volume of urine produced.