Explanation: Cytochrome P450 enzymes function to metabolize potentially toxic compounds. There are 57 human genes coding for various cytochrome450.

Explanation: Demography is the study of statistics such as births, deaths, income, or the incidence of diseases that illustrate changing structure of the human population.

Explanation: Human physiology is the study of how parts of the body and the whole body function.

Auditory ossicles – 6.

Explanation: Cranium (brain box) is the large and hollow part of the human skull that encloses and protects the human brain in the cranial cavity.

Explanation: Ankle in humans is also called tarsus has seven bones called tarsal’s. It is arranged in three rows having gliding joints.

Explanation: Hyaline is present at the joints of long bones.

Explanation: Illiofemoral ligament is a band of great strength which lies in front of joint. It is intimately connected with capsule and serves to strengthen it.

Explanation: Valve normally allows blood to flow in only one direction. There are 4 valves in the human heart. A heart valve opens or closes on differential blood pressure on each side.

Explanation: Vestigial structures are body parts that seemingly have no purpose or function. The coccyx is commonly called as tailbone and is the final segment of the vertebral column in humans.

Explanation: Volkmann’s Contracture is a permanent flexion contracture of the hand at the wrist resulting in a claw like deformity of the hand and finger. Passive extension of fingers is restricted and painful.

Explanation: Neuron is the nerve cell with all its branches. It is the structural and functional unit of the nervous system and is the longest sized (100cm) body cell of human.

Explanation: Corpus callosum is a part of the mind that allows communication between two hemispheres of the brain. It is responsible for transmitting neural messages between both right and left hemisphere.

Explanation: Medulla oblongata is cone-shaped neuronal mass responsible for autonomic functions. This part of brain is centre for respiration and circulation.

Explanation: Spinal nerve arises from spinal cord. In humans, there are 31 pairs. They are 8 cervical, 12 thoracis, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects spinal cord with specific region of the body.

Explanation: Humans can perceive four basic modalities of taste i.e. sweet sour salty and bitter. Other tastes like pepper chocolate etc are experienced by a combination of two or more fundamental tastes.

Explanation: Vestibule is the central art of inner ear and is situated medial to eardrum behind cochlea. It contains organ of hearing (cochlea) and organ of balance (labyrinth).

Explanation: Diaphragmatic pleura is a layer of parietal peritoneum overlaying the thoracic surface of the diaphragm and the lung.

Explanation: Gastrin is a hormone that is produced by g cells in the lining of the stomach and upper small intestine. Gastrin stimulates the stomach to release gastric acid.