Monthly Mock Test (September 30) - NEET MCQ

Hip bone or pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones- ilium, ischium and pubis

The label x is H-zone, y is I band and z is A band.

Each coxal bone is formed by the fusion of three bones – ilium, ischium and pubis.

Since both pulley are connected to each other. So, their angular acceleration are equal.
⇒α₁​=α₂⇒​a₁/ r₁=a₂/ r₂ because α=a/r
⇒a₁/1​​=5/2(Given, a₂=5m/s2)
⇒a1=5/2 ​m/s²
Therefore, D is the correct option.

• Conditional reabsorption of sodium ions and water takes place in distal convoluted tubule (DCT).
• DCT is also capable of reabsorption of HCO3 – and selective secretion of hydrogen and potassium ions and NH3 to maintain the pH and sodium-potassium balance in blood.

Fig: Reabsorption and secretion of major substances at different parts of the nephron (Arrows indicate direction of movement of materials.)

Myofibrils are present in muscles fibers which are parallelly arranged filaments in sarcoplasm. Figure 1 and 2 present relaxed state while figure 3 and 4 represents cross bridge formation.

As P decreases solubility of gas also decreases (Henrys Law)​

Different kinds of skeleton system is found in different organisms. Sphyma contain cartilaginous skeleton. Pediculus contain exoskeleton. Asterias contain endoskeleton and Metridium contains hydrostatic skeleton.

Renal corpuscle, also called malpighian body, filtration unit of vertebrate nephrons, functional units of the kidney.
It consists of a knot of capillaries (glomerulus) surrounded by a double-walled capsule (Bowman’s capsule) that opens into a tubule.

The particular ratio is called as reaction quotient which is compared to a given k value and then the direction of equilibrium iis decided.

• The heart is not involved in excretion. The heart is a muscular organ that pumps blood throughout the body, delivering oxygen and nutrients to the tissues and organs.
• Lungs help in excretion of carbon dioxide
• Liver helps in excretion of toxic substance
• Skin helps in removal of extra salts along with sweat.

Hence, option C is correct.

• Sugar does not ionise in water but NaCl ionises completely in water and produces Na⁺ and Cl^– ions.

• Conductance increases with increase in concentration of salt due to release of more ions.

vapour pressure at the given temperature is constant.​

Tetany is caused due to rapid spasms (wild contractions) in muscle due to low Ca++ inbody fluid.

Renal pyramids, also known as malpighian pyramids, are kidney tissues that are shaped like cones.

Around 7 to 18 pyramids exist in the innermost part of the kidney, which is called the renal medulla.
In humans, there are usually only seven of the pyramids.

Pivot joint: Between atlas and axis called atlanto-axial joint.

The difference in the potential of the body when it rolls down through a vertical height h, is mgh.
As the KE at the top point is zero and let say KE at bottom is ½ mv² + ½ Iw²
Where m is its mass, I is its moment of inertia, I = ½ mr²
Where r is its radius, v is its gained translational speed and w is its gained angular speed.
w = v/r
Hence equating PE and KE gives
mgh = ½ mv² + ½ Iw²
That is mgh = ½ mv² + ½ mr².(v/r)²
We get mgh = ½  mv² + ¼  mv² 
Thus we get v = √gh/3

I_A​=0 (on the Axis .)
I_B​=I_D​=mr²
=m(​l​/√2)²
=ml²/​²
I_C​=m(√2​l)²
I_C​=2ml²
I=I_A​+I_B​+I_C​+I_D​
I=0+ml²/2​+ml²/2​+2ml²
I=3ml²

BF₃ is an electron deficient compound. Hence, it acts as Lewis acid. NH₃ has a lone pair of electrons. Hence, acts as Lewis base. A coordinate bond is formed between the two.
H₃N: →BF₃ 

• The hormonal feedback mechanisms involving the hypothalamus, Juxtaglomerular Apparatus (JGA), and heart primarily regulate blood pressure in the body.
• The hypothalamus responds to changes in blood volume and fluid concentration by releasing hormones like antidiuretic hormone (ADH) to control water reabsorption in the kidneys.
• The JGA, located in the kidneys, detects changes in glomerular blood flow and pressure and releases renin, leading to the production of angiotensin II, which constricts blood vessels and increases blood pressure.
• The heart releases Atrial Natriuretic Factor (ANF) when there is increased blood flow to the atria, promoting vasodilation and lowering blood pressure. Together, these mechanisms work to maintain blood pressure and ensure cardiovascular homeostasis in the body.

Snakes, crocodiles, and birds don’t possess Urinary bladder because they don't urinate, urea and other water soluble stuff are pushed out with the faeces.

Unlike mammals, birds, snakes and crocodiles mix both liquid waste and solid waste into the semi-solid paste. Thus, they do not possess a urinary bladder.

Hence option A is correct.

Le Chaterlier principle is used.

Hip bone is called as innominate bone, kneebone is called as patella, collarbone is called as clavicle and immovable joint is called suture.

The force exerted by liquid at the other end is the centripetal force due to rotation. The case can be treated as rotation of the center of mass of the liquid at distance L/2 from the axis of rotation.
Hence force exerted by liquid at the end = 

The glomerulus is a tuft of capillaries

• Blood enters the glomerulus through the afferent arteriole, a fine branch of the renal artery.
• Blood from the glomerulus is carried away by an efferent arteriole.

Detailed Explanation:

Option A is wrong because blood enters through the afferent arteriole and not the efferent. 

Option B is wrong because there is no such radial arteriole present. And, The collecting duct system is the last part of the nephron and participates in electrolyte and fluid balance through reabsorption and excretion, processes regulated by the hormones aldosterone and vasopressin (antidiuretic hormone). 

Option C is wrong because blood doesn't enter through distributing arteriole because no such arteriole is present. 

Option D is right because blood enters glomerular capillaries through the afferent arteriole and leaves through the efferent arteriole. 

Hence Option D is correct.