MHT CET · BIOLOGY · STD 12 - 9. Control and Coordination

Given below are two statements.
Statement I - In chemical synapse, rate of transmission of impulse is higher in homeotherms than poikilotherms.
Statement II - In chemical synapse, synaptic cleft has a width of about 3.8 nm.
In the light of above statements, select the correct option given below:

A Both statement I and statement II are correct.
B Both statement I and statement II are incorrect.
C Statement I is correct but statement II is incorrect.
D Statement I is incorrect but statement II is correct.

Verified Solution

Answer & Solution

Correct Answer

(C) Statement I is correct but statement II is incorrect.

Step-by-step Solution

Detailed explanation

i. The elevated and stable body temperature of homeotherms accelerates molecular, enzymatic, and ion channel processes, resulting in faster synaptic transmission compared to poikilotherms.
ii. In chemical synapse, synaptic cleft has a width of about 20 to 30 nm.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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In the following diagram of T.S. of Artery, the region marked ' X ' is __________

MHT CET 2018 Easy

Match Column I with Column II.

	Column-I		Column - II
i.	Radial translocation	a.	Translocation of food from phloem to cortex
ii.	Tangential translocation	b.	Translocation of food from phloem to pith
iii.	Longitudinal translocation	c.	Translocation of food from source to sink

MHT CET 2023 Easy

Match the column-I with column-II.

	Column-I (Type of kidney stones)		Column-II (Cause)
A	Calcium stones	I	Genetic disorder
B	Struvite stones	II	Calcium oxalates
C	Uric acid stones	III	Formed in response to infection by urea splitting bacteria
D	Cystine stones	IV	High protein diet

Select the correct option -

MHT CET 2023 Hard

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Given below are two statements.Statement I - In chemical synapse, rate of transmission of impulse is higher in homeotherms than poikilotherms.Statement II - In chemical synapse, synaptic cleft has a width of about 3.8 nm.In the light of above statements, select the correct option given below:

Step-by-step Solution

Given below are two statements.
Statement I - In chemical synapse, rate of transmission of impulse is higher in homeotherms than poikilotherms.
Statement II - In chemical synapse, synaptic cleft has a width of about 3.8 nm.
In the light of above statements, select the correct option given below: