The layer of cells that secrete enamel of the tooth is
Dentoblast
Ameloblast
Osteoblast
Odontoblast
D.
Odontoblast
The pulp cavity contains a mass of dense but soft connective tissue which is called pulp. A single layer of odontoblast cells lines the pulp cavity. These cells secrete enamel, which is a bluish-white shiny translucent and the hardest substance of the body.
Calcitonin is a thyroid hormone which
Elevates potassium level in the blood
Lowers calcium level in a blood
Elevates calcium level in the blood
Has no effect on calcium
Carbon monoxide is a pollutant because it
Reacts with oxygen
Inhibits glycolysis
Reacts with haemoglobin
Makes nervous system inactive
The exchange of gases in the alveoli of the lungs takes place by
Osmosis
Simple diffusion
Passive transport
Active transport
Sympathetic nervous system induces
Heartbeat
Secretion of digestive juice
Secretion of saliva
All of the above
The functional unit of the contractile system in striated muscle is
Cross Bridge
Myofibril
Myofibril
Z-band