Question

JUST ANSWERS. NO EXPLANATION

Unless fertilization occurs, meiosis does not complete in females.

Question 31 options:

	True
	False

Question 32 (2 points)

Nitric oxide (NO) is a neurotransmitter that facilitates penile erection by...

Question 32 options:

	Sending an impulse to the spinal cord for release of acetylcholine.
	Causing smooth muscle relaxation.
	Sending an impulse to the spinal cord for release of norepinephrine.
	Causing smooth muscle contraction.

Question 33 (2 points)

Enzymes are...

Question 33 options:

	Proteins that give blood its osmotic pressure.
	Protein catalysts.
	Polysaccharides that store energy.
	Nucleic acids use to make DNA.

Question 34 (2 points)

Which of the following molecule types would you expect to attach to a protein carrier in order to enter a cell?

Question 34 options:

	Large, polar (such as glucose)
	All of the former are correct.
	Large, non-polar (such as cholesterol)
	Small, non-polar (such as oxygen gas, O2)

Question 35 (2 points)

Fluid that is squeezed out of the glomerulus directly enters the...

Question 35 options:

	Proximal convoluted tubule.
	Loop of Henle.
	Efferent arteriole.
	Glomerular (Bowman's) capsule.

Question 36 (2 points)

Which organic molecule contains nitrogen?

Question 36 options:

	Carbohydrate
	Lipid
	Protein

Question 37 (2 points)

Which of the following is an example of innate immunity?

Question 37 options:

	Stomach acid destroying swallowed bacteria
	Formation of plasma cells
	A baby receiving antibodies through its mother's milk
	All of the former are correct.

Question 38 (2 points)

Which of the following is comprised of all the air in the lungs except that which cannot be forcibly exhaled?

Question 38 options:

	Expiratory reserve volume
	Vital capacity
	Residual volume
	Tidal volume

Question 39 (2 points)

The Krebs Cycle...

Question 39 options:

	Occurs on the inner membrane of the mitochondrion.
	Runs once for every original glucose molecule.
	Does not generate any NADH and FADH2, but makes many ATP directly.
	Regenerates its original substrate at the end.
	All of the former are correct.

Question 40 (2 points)

If a substance has a renal plasma clearance that is higher than the glomerular filtration rate, then that substance must be...

Question 40 options:

	Filtered only.
	Filtered and then reabsorbed.
	Filtered and then secreted.

Answer 1

31.In female ,oocyte is arrested at meiosis-I stage and complete meiosis -II after fertilisation. Thus statement is true.

32.Nitric oxide is involved in erection by mechanism of vasodialation which is carried out by phosphorylating the proteins involved for smooth muscle relaxation .Thus B is correct.

33.Enzymes are biomolecules that catalyses the chemical reaction taking place in the cells.they can be protein or nucleic acid (ribozyme) .Thus B is correct.

34.Protein molecules the polar molecules which can not cross the lipid bilayer .Cholestrol is a lipid soluble molecule it does not requrire the protein for its transport.Oxygen can diffusion across the membrane along the partial pressure gradient. Large polar molecule such glucose requires the special protein for transporting it inside the cell. Thus A is correct.

35.Fluid from glomerulus moves to Glomerular(Bowman's) capsule through mass flow and move to Proximal convoluted tubule , then it moves to Loop of henle, after that it move to Distal convoluted tubule.Thus Option D is correct.

36.Protein are the organic molecules composed of chain of amino acids ,amino acid contains the nitrogen element in there structure .Thus C is correct.

37.Innate immunity is the body's inborn, nonspecific defenses against any pathogen.Secretion of acid in stomach is exmaple of innate immunity while formation of plasma cells and antibodies present in the mother's milk is example of acquired immunity.

38.Expiratory volume , Tidal volume and Vital capacity (IRV+ERV+TV) are the lung capacities which can be expelled but residual volume can not be expelled out even afrter forcefull expiration, as it the volume of air occupied by alveoli of lungs to maintain there expansion and prevent collapsing of alveoli .Thus C is correct.

39.Kreb cycle is cycle for production of energy from the pyruvate molecule.Its substrate is Acetyl CoA which combine with the Oxaloacetate to form the citrate molecule ,and during the kreb cycle 3NADH2 and 1 FADH2 are produced .It occur on the inner membrane of mitochondria.One glucose molecule produces two molecules of pyruvate ,so kreb cycle occurs twice for one glucose molecule. Thus A is correct.

40.Renal plasma clearance is volume a substance which is eliminated from the plasma per unit time.If a substance have higher renal plasma clearance then its glomerular filtration rate ,then secretion is thought to be present.Thus C is correct.