The type of muscle tissue that is voluntary and striated is: MCQ with Answer and Explanation

Explanation:
Myelin, a lipid-rich sheath formed by Schwann cells (PNS) or oligodendrocytes (CNS), insulates axons, allowing saltatory conduction—impulses jump from one node of Ranvier to the next, greatly speeding up transmission. It also conserves energy. Demyelinating diseases like multiple sclerosis slow conduction.

Explanation:
Angiosperms are flowering plants where seeds are enclosed within a mature ovary (fruit). They are characterized by double fertilization, where one male gamete fuses with the egg and the other with the secondary nucleus. They exhibit immense diversity in habit, ranging from tiny aquatic Wolffia to massive trees, so not all are trees. Statements 1 and 2 are correct.

Explanation:
Inspiration (inhalation) occurs when the intra-pulmonary pressure is less than the atmospheric pressure. This is achieved by the contraction of the diaphragm, which flattens and moves downwards, and the contraction of external intercostal muscles, which lift the ribs and sternum. This increases the thoracic volume and lung capacity, drawing air in. Expiration involves relaxation of these muscles.