Tag: biology

Questions Related to biology

Which one of the following statements is correct regarding blood pressure?

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. 130/90 mm Hg is considered high and requires treatment.

  2. 100/55 mm Hg is considered an ideal blood pressure.

  3. 105/50 mm Hg makes one very active.

  4. 190/110 mm Hg may harm vital organs like brain and kidney.

Show answer
Correct Option: D
Explanation:
The blood pressure above 140/90 mm Hg is considered a high blood pressure and recurrent such values of an individual’s blood pressure can indicate hypertension. Blood pressure with more than values 190/110 mm Hg can have disastrous effects on the kidney and the brain.
Thus, the correct answer is '190/110 mm Hg may harm vital organs like brain and kidney.'

Blood pressure is defined as the force with which blood

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. Comes out of the atrium

  2. Is pushed to the legs

  3. Pushes against wall of blood vessels

  4. Comes out of the ventricle

Show answer
Correct Option: C
Explanation:

The force with which the blood pushes against the walls of the blood vessels, usually arteries, is known as the blood pressure. It is described in the unit mm Hg. The normal diastolic and systolic pressure of the adult human heart is 120 mm Hg and 80 mm Hg, respectively.

Thus, the correct answer is 'Pushes against wall of blood vessels.'

Which of the following statements is incorrect ? 

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. Mammals have the ability to produce concentrated urine.

  2. Counter current is due to the flow of filtrate in two limbs of Henle's Loop in opposite direction.

  3. Henle's loop and vasa recta play a significant role in concentrating the urine.

  4. Flow of fitrate through vasa recta also follow the counter current pattern.

Show answer
Correct Option: D
Explanation:

Flow of blood through vasa recta follows counter current pattern. Filtrate flows through loop of Henle.

The reabsorption of the sodium from glomerular filtrate is regulated by the hormone _____________.

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. Glucagon

  2. Secretin

  3. Aldosterone

  4. Adrenaline

Show answer
Correct Option: C
Explanation:

Aldosterone is secreted by the outer layer of the adrenal gland. When aldosterone is present in the blood, all the $Na^{+}$ in the filtrate is reabsorbed b the epithelial cells of DCT and collecting duct. Retaining $Na{+}$ raises the osmotic pressure of the blood and reduces water loss from the body. 

State the following statement true or false:
Contraction phase of the heart is the diastole. 

biology life processes blood pressure circulatory system transportation in animal and plants

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

A) The contraction phase of the heart is called systole.

B) The relaxation phase of the heart is called diastole.
So the correct answer is 'False'.

Normal systolic and diastolic value of blood pressure is

biology life processes blood pressure circulatory system transportation in animal and plants

  1. 80/120 mm Hg

  2. 80/40 mm Hg

  3. 140/80 mm Hg

  4. 120/80 mm Hg

Show answer
Correct Option: D
Explanation:

A) Blood pressure is always read as systolic/diastolic pressure. Systolic pressure is 120 mm Hg while diastolic pressure is 80 mm Hg.

B) The systolic pressure is 120 mm Hg while diastolic pressure is 80 mm Hg.
C) Systolic pressure is 120 mm Hg.
D) 120 mm Hg here, represents the systolic pressure and 80 mm Hg represents the diastolic pressure.
So the correct answer is '120/80 mm Hg'.

Excess of Na++ ions in human system causes____________________

biology life processes blood pressure circulatory system transportation in animal and plants

  1. Diabetes

  2. Anemia

  3. Low blood pressure

  4. High blood pressure

Show answer
Correct Option: D
Explanation:

  • The increasing of the concentration of Sodium ions in blood would attract water from the surrounding issues, because of the osmotic pressure.
The increasing of the total volume of blood makes the blood pressure higher.
Hence,

Option $D$ is the correct answer.

Which of the following figure illustrates the systolic and diastolic pressure?

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. 120 mm Hg

  2. 80 mm Hg

  3. 120 mm Hg and 80 mm Hg respectively

  4. 80 mm Hg and 120 mm Hg respectively

Show answer
Correct Option: C
Explanation:

The diastole phase is the phase of relaxation where the chambers of the heart relax and blood fills into the respective chambers. The systolic phase is the phase of contraction. The normal systolic pressure is about 120 mm Hg & diastole pressure is 80 mm Hg.

So, the correct answer is option C.

Cardiac systole is the .......... cardiac muscle in response to an electrochemical stimulus to the heart's cell. 

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. Relaxation

  2. Contraction

  3. Both A and B

  4. None of the above

Show answer
Correct Option: B
Explanation:

The diastole phase is the phase of relaxation where the chambers of the heart relax and blood fills into the respective chambers. The systolic phase is the phase of contraction. The normal systolic pressure is about 120 mm Hg & diastole pressure is 80 mm Hg. So, the correct answer is option B.

Which one of the following statements is correct regarding blood pressure?

biology human body and organ system blood pressure circulatory system transportation in animal and plants

  1. $130/90 $ mm Hg is considered as high and requires treatment.

  2. $100/55 $ mm Hg is considered ideal blood pressure.

  3. $105/50 $ mm Hg makes one very active.

  4. $190/110 $ mm Hg may harm vital organs like brain and kidney.

Show answer
Correct Option: D
Explanation:
The normal range of blood pressure is 120/80. Blood pressure higher than this leads to hypertension. High blood pressure affects the walls of arteries that carry the blood to the vital organs and cause the tear in the walls.
Bad cholesterol from bloodstream gets trapped in the torn walls and starts building there thus narrowing the arteries wall. When the proper amount of blood can’t move through a blocked artery, it causes damage to the tissue or organ. it’s supposed to reach. When a larger blockage of blood to the brain occurs, it’s called a stroke. If parts of the brain can’t get the oxygen they receive from blood, cells begin to die. High blood pressure damage the larger blood vessels can lead to kidney failure. Thus, the correct answer is option D.