The hormones secreted by islets of Langerhans are

The major part of the pancreas is

A. ducted

B. fluid filled

C. ductless

D. non fluid filled

A specific messenger molecule synthesized by an endocrine gland is

A. enzyme

B. hormone

C. chemical

D. activator

In positive feedback, the rate of a process

A. increases

B. remains constant

C. changes

D. decreases

A fatty layer secreted by Schwann cells is

A. fatty cover

B. fatty sheath

C. myelin sheath

D. oily sheath

Skeletal muscles, thinking, intelligence and emotions are controlled by

A. cerebellum

B. cerebrum

C. hypothalamus

D. thalamus