Answer:
The muscle that extends forearm at the elbow is the <em>triceps</em><em> </em><em>brachii</em>
Answer:
mobile sources – such as cars, buses, planes, trucks, and trains.
stationary sources – such as power plants, oil refineries, industrial facilities, and factories.
area sources – such as agricultural areas, cities, and wood burning fireplaces.
Explanation:
Answer:
True. You can get vitamin A as "preformed vitamin A" which is already active and/or you can get vitamin A as carotenoids which the body can turn into active vitamin A.
Explanation:
There are two different types of vitamin A that can be obtained from food:
1. Preformed vitamin A, which is already active, is found in animal products such as beef, fish, poultry and dairy products.
2. Provitamin A, which is the inactive form, is found in plant-based foods, such as fruits and vegetables. The most common type of provitamin A is β-carotene, which is a carotenoid that the body can turn into active vitamin A via an enzyme named β-carotene 15,15'-monooxygenase.
Answer:
glucose and other sugars, ions etc
Explanation:
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.
