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Click on the box that says “Blood Pressure”

What are some things that cause blood pressure to increase or decrease? (There are 4 correct answers.)

(4 points)
Responses

How much you weigh
How much you weigh

The amount of blood your heart pumps
The amount of blood your heart pumps

Stress
Stress

Your brain responding to the amount of oxygen and carbon dioxide in your blood
Your brain responding to the amount of oxygen and carbon dioxide in your blood

The amount of blood in your body

9 answers

The four correct answers that can cause blood pressure to increase or decrease are:

  1. How much you weigh – Weight can influence blood pressure; being overweight can lead to higher blood pressure.

  2. The amount of blood your heart pumps – Cardiac output, which is the amount of blood the heart pumps, directly affects blood pressure; more blood pumped means higher blood pressure.

  3. Stress – Stress can lead to temporary increases in blood pressure due to the release of stress hormones.

  4. The amount of blood in your body – Blood volume affects blood pressure; more blood volume means higher pressure, while less volume can lower it.

The option about "Your brain responding to the amount of oxygen and carbon dioxide in your blood" is less directly related to blood pressure regulation compared to the other options.

What happens to body temperature as your blood vessels dilate (blood pressure decreases)?(1 point)
Responses

Body temperature does not change.
Body temperature does not change.

Body temperature decreases.
Body temperature decreases.

Body temperature increases.

When blood vessels dilate (a process known as vasodilation), it allows more blood to flow through the vessels near the surface of the skin. This increased blood flow can lead to an increase in body temperature as heat is released from the warm blood to the environment.

Therefore, the correct response is:

Body temperature increases.

Click on the box that says “Perspiration”

Why do bodies sweat when we get too hot?

Bodies sweat when we get too hot primarily as a means of thermoregulation. Here’s why sweating is important:

  1. Cooling Mechanism: Sweating is the body's way of cooling itself down. When sweat evaporates from the surface of the skin, it removes heat and lowers body temperature.

  2. Homeostasis: Maintaining a stable internal body temperature (homeostasis) is crucial for proper function. Excess heat from metabolism, physical activity, or environmental factors can disrupt this balance.

  3. Fluid Regulation: Sweating also helps regulate fluid balance in the body, although excessive sweating can lead to dehydration if fluids are not replenished.

In summary, bodies sweat to release heat and help maintain a stable internal temperature when the environment or activity level causes an increase in body temperature.

Click on the box that says “Blood Sugar”

Which hormone causes your blood sugar to increase?

Which hormone causes your blood sugar to decrease?

Which part of your body releases (secretes) these two hormones?

Hormones that Regulate Blood Sugar:

  1. Hormone that Causes Blood Sugar to Increase:

    • Glucagon: This hormone raises blood sugar levels by promoting the conversion of glycogen (stored glucose) in the liver to glucose, which is then released into the bloodstream.

  2. Hormone that Causes Blood Sugar to Decrease:

    • Insulin: This hormone lowers blood sugar levels by facilitating the uptake of glucose into cells for energy or storage as glycogen in the liver and muscles.

Part of the Body that Releases These Hormones:

  • Both insulin and glucagon are secreted by the pancreas. The pancreas has clusters of cells known as the islets of Langerhans, which contain alpha cells (that produce glucagon) and beta cells (that produce insulin).
Use 3-5 sentences to tell about a time when your body had a change in one of the variables that homeostasis balances. (Example: A time when you got really cold and your teeth started to chatter.) Use what you know about homeostasis to explain how your body responded.(5 points)

One time, I was hiking on a particularly hot day, and my body began to overheat, causing me to sweat profusely. As my body temperature rose, sweat glands activated to produce sweat, which evaporated from my skin and helped cool me down. This sweating is part of the body’s thermoregulation, a key aspect of homeostasis, which strives to maintain a stable internal temperature despite external conditions. Additionally, I began to feel thirsty, prompting me to drink water to replenish the fluids lost through sweating and to support overall hydration and blood volume. These responses demonstrate how my body worked to restore balance and prevent overheating.