Protection for the head is needed in cases of direct collision sports like hockey and football. Collisions with another player or the turf may result in a concussion, thus all the helmets must possess NOCSAE certifications.
The helmet should fit comfortably around all the segments of the player's head, there should be no gaps between the head and pads. It should cover the base of the skull, the pads positioned at the back of the neck should be comfortable, and at the same time should not be uncomfortable.
The helmet should not come down over the eyes, the front edge of the helmet should be 3/4 inch or of two finger widths above the eyebrows.
Answer:
Enzymes are proteins that increase (only) the rate of chemical reactions converting substrate into product.
Catalysts are substances that increase or decrease the rate of a chemical reaction but still remain unchanged.
Answer:
1-f; 2-e; 3-a; 4-b; 5-c; 6-d.
Explanation:
Integumentary System - Regulates body temperature, houses cutaneous receptors and synthesizes vitamin D
Nervous System - Responsible for consciousness and memory
Endocrine System - Secretes hormones
Lymphatic System - Transports and filters lymph fluid
Urinary System - Filters and removes waste products from blood
Respiratory System - Responsible for gas exchange between blood and air
Photosynthesis
During photosynthesis, plants use sunlight, water, carbon dioxide to create energy and oxygen gas is liberated as a by-product of this process. Sunlight: Sunlight also produces oxygen. Some oxygen gas is produced when the sunlight reacts with water vapour in the atmosphere.
Hope this helps and good luck :))
The cortex which is composed of neurons and their supporting cells, and in living brain, has a gray color thus called the gray matter.
