The surface of nerve fibers bears narrow areas called
1). Schwann cells
2). Schwann nodes
3). Nodes of Ranvier
4). Nissl's granules
The Jersey bull used for cross breeding is exotic variety from
1). USA
2). UK
3). Switzerland
4). Holland
Osmoregulation is control over the
1). Removal of nitrogen from the body
2). Concentrations of salt and water in the body
3). Osmotic properties of cell membranes
4). PH of the blood
Appearance of ancestral characters in the new borne, such as tail, multiple mammae, etc., are known as
1). homologous
2). analogous
3). atavistic
4). vestigial
Which one of the following events takes place during inspiration in man?
1). The internal intercostals muscles relax
2). Due to contraction of external intercostals muscles and flattening of diaphragm the volume of thoracic cavity increases
3). Due to contraction of external intercostals muscles, and flattening of diaphragm the volume of thoracic cavity decreases
4). The abdominal muscles contract