How are involuntary actions and reflex actions different from each other?

Characteristics Involuntary actions Reflex actions Action These body functions are performed without the conscious control of the brain. These are involuntary but spontaneous responses to a sudden external stimulus, which is controlled by the spinal cord. Characteristics Involuntary actions Reflex actions Response The involuntary action mostly affect the movement or functioning of internal body parts such as the movement of the heart during a heartbeat. Reflex action produces an external response which involves the movement of skeletal muscles, such as the movement of hands away from a hot surface.

Write the name of hormone secreted from Thyroid gland.

The thyroid gland is located in front of the neck. Triiodothyronine (T3) and Thyroxine (T4) are two hormones secreted from the thyroid gland. It helps in metabolism, digestion, heart and muscle function, maintains bone health, regulation of body weight.

Give an example of animal hormone that secretes from pituitary gland.

The hormones secreted by the pituitary gland control the secretions of many other endocrine glands like the thyroid, adrenal, and gonads and so it is called the master gland. For example pituitary secrets ACTH which controls the hormones of the adrenal cortex, the hormone TSH controls the secretion of thyroid gland, etc. Also, there is a feedback mechanism by which the pituitary increases or decreases the production of other endocrine glands. Growth hormone is an example of the hormone that secretes from pituitary gland.