Tag: control and co-ordination in plants and animals

The adrenal glands (also known as supra-renal glands) are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. They are found above the kidneys.

When the body has extra glucose, it stores it in the liver and muscles. This stored form of glucose is called glycogen.

Homeostasis relates to dynamic physiological processes that help us maintain an internal environment suitable for normal function. Feedback mechanism also helps in maintaining this balance of the hormones in the body.

Myxedema refers to a severe form of hypothyroidism than can occur when the condition is left untreated or is not treated sufficiently. The term also applies to the effects that hypothyroidism can have on the skin, making it appear swollen and puffy.

Testosterone is the primary male sex hormone and an anabolic steroid. In male humans, during puberty, the growth of mustache and beard is seen as a sign of growth.

All the mentioned are the secretions of the adrenal gland.

A neuron can be defined as a long cytoplasmic process of the cell body, which transmits the impulse from the cell body to other neurons is termed. The axon is covered by a lipid-rich membrane, called myelin sheath. The myelin sheath is formed by Schwann cells and each Schwann cell covers a part of the axon.
Thus, the correct answer is the option (B), 'Axon of neurons'.

A reflex arc is a simple nervous pathway and consists of the sensory receptor, afferent neuron, center, efferent neuron and effector organ. 

• Digestion of food, contraction, and relaxation of blood vessels and many other movements are involuntary as we cannot really start or stop them simply by our will.