Among the cells of the human body, brain cells have the least regenerative power.
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The smallest structural and physiological unit of the nervous system is the neuron. Neurons are specialized cells responsible for transmitting information throughout the body via electrochemical signals, enabling various functions such as perception, cognition, and motor control.
The largest cell of the human body is Nerve cell. Nerve cells, also known as neurons, can vary in size but can extend long distances, such as motor neurons that run from the spinal cord to the toes, making them ...
In humans, 31 pairs of nerves emerge from the spinal cord. These spinal nerves are responsible for transmitting sensory and motor information between the spinal cord and various parts of the body, facilitating movement and sensation.
The control center of reflex actions is – In the vertebral cord. Reflex actions are rapid, involuntary responses to stimuli that are mediated by neural circuits within the spinal cord, bypassing the brain’s involvement for quicker reactions to potential threats ...
The process of respiration takes place in Mitochondria. Mitochondria are organelles responsible for cellular respiration, where oxygen is used to break down glucose molecules and produce ATP, the energy currency of the cell.
In humans, the amount of O₂ in the air exhaled during respiration is 16%. Exhaled air contains a lower concentration of oxygen compared to inhaled air because oxygen is absorbed by the body’s tissues during cellular respiration.
As a result of complete oxidation of glucose, 38 molecules of ATP are formed. This process occurs through cellular respiration, which includes glycolysis, the Krebs cycle, and oxidative phosphorylation, producing a large amount of ATP.
A human being typically breathes 20-25 times in a minute. This respiratory rate can vary depending on factors such as age, physical activity, health status, and environmental conditions but generally falls within this range for adults at rest.
The conversion of food into energy takes place in Mitochondria. Mitochondria are organelles responsible for cellular respiration, where glucose and other nutrients are oxidized to produce ATP, the energy currency of the cell.