Human body systems thermoregulation test

Explain how negative feedback can stabilize a system

Negative feedback is a reaction that causes a decrease in function. It occurs in response to some kind of stimulus. Often it causes the output of a system to be lessened; so, the feedback tends to stabilize the system. This can be referred to as homeostasis

Imagine that a population of people lived in very cold, snowy conditions for many generations. What kind of adaptation might that population develop over time? Why?

Short stocky, ability to Retain body fat, more hair

Describe vasodilation and vasoconstriction. Explain how these processes help to cool and or warm the body?

Shrinking the diameter of blood vessels that supply the skin, a process known as vasoconstriction, reduces blood flow and helps retain heat. ... Vasodilation increases blood flow to the skin and helps the animal lose some of its extra heat to the environment.

How does sweating cool down a person's body?

Sweat helps cool you down by releasing moisture onto your skin. But that's not all that's going on. On a hot day, your sweat evaporates from your skin taking a little bit of your body heat with i

How does sweat cool the body?

Sweat helps cool you down by releasing moisture onto your skin. But that's not all that's going on. On a hot day, your sweat evaporates from your skin taking a little bit of your body heat with it. ... So your sweat won't evaporate very much because the humid air can't hold very many more water molecules.

Imagine that a population of people lived in very hot, dry conditions for many generations. What kind of adaptation might that population develop over time? Why?

Taller, slimmer, more exposed surface area, because its easier to release heat

Why does the amount of humidity in the air affect the environmental temperature a human can withstand?

The concentration of water in the air, relative to the temperature (relative humidity) determines the rate at which the water can evaporate from the skin. When the air is holding more moisture (relative to the total moisture it could hold at that temperature), it is harder for the air to absorb the sweat from our skin.

Describe how "feedback mechanisms" maintain a living system's internal conditions and allow it to remain alive

The tendency to maintain a stable, relatively constant internal environment is called homeostasis. The body maintains homeostasis for many factors in addition to temperature. For instance, the concentration of various ions in your blood must be kept steady, along with pH and the concentration of glucose.

Why do surgeons sometimes cool down a person's body during surgery?

To prevent organ damage

What are some behavioral adaptations that help animals maintain body temperature?

elephants spray themselves with water to cool down on a hot day, and many animals seek shade when they get too warm. On the other hand, lizards often bask on a hot rock to warm up, and penguin chicks huddle in a group to retain heat.

what part of the brain responds to a change in body temperature?

hypothalamus

How are fur and blubber involved in thermoregulation?

mammals use hair or fur, to trap a layer of air next to the skin and reduce heat transfer to the environment. Marine mammals like whales use blubber, a thick layer of fat, as a heavy-duty form of insulation.

What thermoregulatory process involves skeletal muscle tissue?

shivering, skeletal muscles begin to shake in small movements, creating warmth by expending energy.

What is kinetic energy?

the energy an object has due to its motion

Why do humans have a set point of 37 degrees Celsius (98.6 degrees F)?

Apparently it's the perfect balance, as it's warm enough to prevent fungal infection but not so hot that we need to eat nonstop to maintain our metabolism.

What thermoregulatory process involves smooth muscle tissue?

Arteriolar vasodilation, The smooth muscle walls of the arterioles relax allowing increased blood flow through the artery. This redirects blood into the superficial capillaries in the skin increasing heat loss by convection and conduction.

Describe how thermoregulation happens at the cellular, tissue, organ, and body levels.

Cellular- thermoregulation happens during respiration, which releases heat, and the breakdown of atp into adp Tissue- Muscle fibers, movement and muscle contractions, muscles relaxing, vasodilation Organ- Same as tissue Body level- shivering, sweating