Question

Please answer all question from 1-5

Use of neuromodulators, such as cocaine, can result in: Select one: O a addiction to drugs O b. reduction in postsynaptic membrane receptors O C. reduced reabsorption of neurotransmitters into the pre-synaptic cell O d. all of the above Choose the correct path that blood takes to become urine and be excreted. Select one: a renal artery, kidney (collecting tube), kidney (loop of Honle), kidney (Bowman's capsule and glomerulus), ureter, urinary bladder, urethra Ob renal artery, kidney (Bowman's capsule and glomerulus), kidney (loop of Henle), kidney (collecting tube), ureter, urinary bladder, urethra c. renal artery, ureter, urinary bladder, urethra, kidney (Bowman's capsule and glomerulus), kidney (loop of Henle), kidney (collecting tube) od kidney (Bowman's capsule and glomerulus), kidney (loop of Henle), kidney (collecting tube), renal artery, ureter, urethra, urinary bladder which are produced in the forma after fertilization Select one a Gametes, zygote, gonad b. Gametes gonads, zygote cGonads gamotes, zygote Od Zygotes, gonads gamete

Answer 1

1. D. All of the above .

Explanation:

Cocaine is a drug which has a highly addictive property.

Cocaine inhibits the reuptake of dopamine by blocking the protein receptor which is present in the pre-synaptic cell. It also reduces post synaptic receptor molecules.

So all the above options are correct.

2. Correct path is

B. Renal artery , kidney ( Bowman's capsule and glomerulus) , kidney ( loop of henle), kidney (collecting tube), ureter, urinary bladder, urethra.

Explanation:

Afferent branch reenal artery -Glomerulus Distal Convoluted Tubule Proximat convoluted Tubule Collecting duct Loop of Henle diagram After collecting ducts the urine follows the next -Kidney Ureter Bloddere -Urinary • Unethna

The arrow in the picture indicates the pathway of forming urine.

So the correct sequence is Renal artery , kidney ( glomerulus , Bowman's capsule), kidney ( loop of henle), kidney ( collecting tube), ureter, urinary bladder and urethra.

Other options dont follow the sequence. So they are incorrect.

3. B. Gametes , gonads , zygotes.

Explanation:

In the gonads haploid gametes are produced. Two haploid gametes are fertilizied to form a zygote.

So the correct line is

Gametes which are produced in the gonads form a zygote after fertilization.

4. Correct optiom is

B. Bind to receptors in the cytoplasm or nucleus.

Explanation:

The mechanism of action of steroidal hormone is given below-

Why other options are not correct.

It doesn't bind to the receptor of plasma membrane. So A is not correct.

These are not syntthetics. Naturally occurring steroids are testosterone.They doesn't harm to men and women. They are necessary for our growth. So option C is not correct.

After binding to specific binding site on DNA the synthesize various proteins.So we see that transcription and translation process is not inhibited.

So option d is also not correct.

5. C. Skeletal muscle movement.

Explanation:

Skeletal muscle is under voluntary action of CNS. We can move our skeletal muscle according to our will.

Why other options are not correct:

Heart rate is not under our voluntary control. So option A is incorrect.

We don't have any control over secretion of digestive enzymes. So option B is incorrect.

We dont have any control of constriction and dialation of bronchioles which are present in lungs. So option D is incorrect.