Assertion (A) : Castration does not eliminate sexual behaviour completely in mammals, including humans, of both sexes.
Reason (R) : Hormones do not play role in the regulation of sexual behaviour.
Castration and Sexual Behaviour Analysis
Assertion (A) states that castration does not completely eliminate sexual behaviour in mammals, including humans. This is true. While gonadal hormones are primary drivers, sexual behaviour is influenced by various factors like neural circuits, psychological states, and established behavioural patterns, which can persist post-castration.
Hormonal Regulation of Sexual Behaviour
Reason (R) claims hormones play no role in regulating sexual behaviour. This is false. Hormones, particularly sex steroids like testosterone and estrogen, are critical for sexual development, motivation, and performance in mammals. Their influence is well-documented across numerous studies.
Conclusion
Evaluating the statements:
- Assertion (A) is factually correct.
- Reason (R) is factually incorrect.
Therefore, the correct choice is that Assertion (A) is true, but Reason (R) is false.
Important Questions from System Physiology Animal
Which one of the following synaptic vesicles (as observed under transmission electron microscope) contains catecholamines?
Blood hemostasis is the interplay of several intrinsic and extrinsic factors. Deficiency of some of the blood clotting factors and their clinical manifestations are listed below.
Factors
Manifestations
A.
V
i.
Hageman trait
B.
VII
ii.
Hypoconvertemia
C.
IX
iii.
Hemophilia B
D.
XII
iv.
Parahemophilia
Which one of the following options represents all correct matches?
Aldosterone is synthesized exclusively in zona glomerulosa due to the presence of _________ enzyme in addition to a dehydrogenase.
How much hemoglobin is present approximately in each normal human red blood cell?
The sensory nerve fibers (Column X) and the sensory receptors connected to different sensory nerves (Column Y) are given below.
Column X
Column Y
Sensory nerve fibre
Sensory receptor
A.
la
i.
Muscle spindle, flower spray ending
B.
Ib
ii.
Pain and cold receptor
C.
II
iii.
Muscle spindle, annulo-spiral ending
D.
III
iv.
Golgi tendon organ
Which of the following options represents the correct match between column X and column Y?
