Question

Answer the following:
(a) Which part of the ear determines the pitch of a sound?
(b) Which part of the human brain is the most developed?
(c) Which part of our central neural system acts as a master clock?

Answer 1

The sense organs of an organism like, eyes, ears, tongue, skin, and nose help to protect the body. The human sense organs contain receptors that relay information through sensory neurons to the appropriate places within the nervous system.

Complete answer: a) The Cochlea determines the sound's pitch. The cochlea is related to the hearing process. When it spirals, it appears like the shell of a snail. The organ of the corti (also called spiral organ) is the receptor organ for hearing and is located within the cochlea of a mammalian. In mammalian ears, the cochlear nerve, and the auditory cortex are the sensory receptors of hearing.
b) There are different parts of the human brain, such as the Cerebrum, Cerebellum, Pons, Medulla oblongata, etc. The cerebrum is the most developed component of the human brain, it forms 83percent of the total weight and it is divided into four lobes from both the hemisphere and which are
i.Frontal lobe: it is motor in action.
ii.Parietal lobe: sensory in function.
iii.Occipital lobe: sensory visual in function.
iv.Temporal lobe: sensory information, such as the sense of smell, sense of taste, and sense of hearing.
c) In the human body, the hypothalamus functions like a master clock. The master circadian clock that governs 24hour cycles throughout our bodies is located in an area called the suprachiasmatic nuclei (SCN) in the hypothalamus of the brain. The SCN consists of two small clusters of several thousand nerve cells that are based on external signals, such as light and darkness, "tells time". Sleep, metabolism, and hormone production are regulated by the SCN.

Note: The command center for the human nervous system is the human brain. It receives signals from the sensory organs of the body and supplies the muscles with data. The human brain has the same basic structure as other mammalian brains but is larger than any other brain in comparison to body size.