Answer:
B. Cells are the basic units of structure and make up tissues.
Explanation:
According to the cell theory, cells can be described as building blocks of an organism. All living things are made up of cells. All cells are made up of former living cells. The cell theory discarded the previous excepted theory of existence of cells from non- living things.
The image shows that in multicellular organisms like plants, different cells are present. Cells of a similar type combine to make tissues.
Answer:
<h3> Somatic: </h3>
- Skeletal muscle activation
- Voluntary
- Principally involved with movement "of" the body.
<h3>Autonomic: </h3>
- Can be excitatory or inhibitory on the target organ.
- Principally involved with the movement of materials through the body.
- Intestinal smooth muscle activation.
- Sweat gland activation
- Lacrimal gland activation
- Piloerector muscle
- Involuntary activation.
Explanation:
We can divide the nervous system into the central nervous system, which consists of the brain and spinal cord, and the peripheral nervous system, which consists of all the nerves that are throughout the body carrying information from and to the central nervous system.
We divide the peripheral nervous system into the somatic nervous system and the autonomic nervous system.
The somatic nervous system is the conscious one, that is to say, that we know and control what it does. It is voluntary. It has motor and sensory neurons that carry information to and from the central nervous system. The somatic nervous system is the one that makes us move our muscles to do an action.
The autonomic nervous system is involuntary. In other words, we can not control it consciously. It is the one that controls glands, organs, and smooth muscle, like the one that surrounds the digestive tract to move the food. As we can not consciously control it, this system can work exiting or inhibiting an organ depending on the situation.
Answer:
selective breeding is when it's selected by people not by nature for example. a farmer chooses the cows that give more milk , that's an example of selective breeding
D-walls and doors would represent the cell membrane
