Answer:
Hypothalamus of human body system interact to perform temperature regulation along with nervous system and endocrine system.
Explanation:
Hypothamus is an important part of our lower brain that play a significant role in regulation of body temperature.
Hypothalamus works with nervous system along with the other parts of our body such as blood vessels,skin and sweat gland to maintain temperature homeostasis of human body.
When our body temperature rises at that time hypothalamus slows down the rate of metabolism of our body to restrict further increase in our body temperature and also dilates the blood vessels present beneath the skin so that body can liberate heat to the environment.
on the other hand when the body temperature decreases at that time hypothalamus increases the metabolic rate of our body to increase the body temperature and also the constrict the blood vessels present under the skin.
Answer: DESERT
Explanation:
Adaptation can be defined as the modification in the form, structure, function and behaviour of organisms in a habitat which enables them to live successfully and reproduce.
Desert is one of the types of the world biomes that is characterized with little or no rain and to extreme temperatures. Organisms, which includes plants and animals, must show some level of adaptation to able to survive the harsh environment.
The type of PLANTS which can survive in desert environment are called the XEROPHYTES. They show the following adaptations:
--> The roots are well developed: they grow down to great depths and branch extensively in order to absorb water
--> they possess swollen stems which contains water storage cells.
--> they have reduced leaves, for example in cacti in the form of spines, which helps to reduce water loss through transpiration.
The type of animal that survive in desert environment spend the hot dry seasons in a sleep-like torpid state called aestivation. This is so in order to avoid the heat. Their body size is usually small and less bulky: greater surface area in relation to body volume, thus enhancing heat loss from the body.
Organisms that live in the _________ must be adapted to little or no rain and to extreme temperatures.
Answer:
Thoracolumbar origin, short preganglionic fiber, ACh release at ganglion, long postganglionic fiber, NE release at effector
I'm not very sure about this one but I think it's density
Answer: Microtubules
Explanation:
The cytoskeleton is a three-dimensional network of proteins that provides internal support in the cells, organizes the internal structures and intervenes in the phenomena of transport, traffic and cell division. In eukaryotic cells, it consists of actin filaments, intermediate filaments and microtubules.
<u>The microfilaments maintain the shape of the cell.</u> Other functions are the formation of cytoplasmic protuberances such as pseudo and microvilli, participating in intercellular or cell-matrix junctions, signal transduction, cell mobility (in the case of muscle cells, and together with myosin, they allow muscle contraction) and in animal cell cytokinesis, the formation of a contractile ring that divides the cell in two.
<u>Intermediate filaments are fibrous protein filaments which constitute the most stable (supporting organelles by their strong bonds) and heterogeneous components of the cytoskeleton.</u> Their main function is to organize the internal three-dimensional structure of the cell (for example, they are part of the nuclear envelope and the sarcomers). They also participate in some intercellular junctions (desmosomes).
<u>Microtubules are tubular structures that originate in microtubule organizing centers and extend along the cytoplasm. They can be polymerized and depolymerized according to the needs of the cell</u>. They are found in eukaryotic cells and are formed by the polymerization of a dimer of two globular proteins, alpha and beta tubulins. Each microtubule is composed of 13 protofilaments formed by the tubulin dimers. <u>They are involved in various cellular processes involving displacement of secretion vesicles, movement of organelles, intracellular transport of substances, as well as in cell division (mitosis and meiosis), since they form the achromatic spindle. In addition, they constitute the internal structure of cilia and flagella. </u>
Microtubules are composed of a protein called tubulin and they are the largest type of filament and its diameter is about 25 nanometers (nm). While actin filaments are made of actin and they are smaller, with a diameter of about 6 nm. And intermediate filaments have a diameter of about 10 nm, which is intermediate between the diameters of the two other principal elements of the cytoskeleton.
