Human Body Systems Worksheet (3-Day Activity)

The body maintains balance and supports the needs of all its systems through:

• homeostasis

• digestion

• photosynthesis

• fermentation

The body plays what role in keeping internal conditions stable during daily activities?

• It maintains homeostasis.

• It increases external temperature.

• It disrupts internal balance.

• It ignores changes in the environment.

Different parts of the body work together to maintain homeostasis by:

• coordinating functions through communication and feedback mechanisms

• working independently without interaction

• relying solely on the nervous system

• ignoring changes in the internal environment

Muscles contribute to overall health by:

• supporting movement and maintaining posture

• producing hormones for digestion

• filtering toxins from the blood

• regulating body temperature through sweating

Bones grow and heal through which of the following processes?

• By the activity of bone cells that build and repair tissue

• By absorbing nutrients from the skin

• By stretching and contracting like muscles

• By producing energy like the heart

Bone marrow creates blood cells by:

• producing stem cells that develop into different types of blood cells

• filtering blood to remove old cells

• absorbing nutrients from the bloodstream

• breaking down bone tissue to release cells

The mechanisms that enable the heart to circulate blood effectively throughout the body include:

• Coordinated contractions of the heart chambers and functioning valves

• Passive diffusion of blood through tissues

• Direct absorption of oxygen by heart muscle

• Random movement of blood cells

The distinction between oxygenated and deoxygenated blood is essential for maintaining homeostasis because:

• it ensures efficient delivery of oxygen to tissues and removal of carbon dioxide.

• it allows blood to flow only in one direction through the heart.

• it prevents the mixing of nutrients and waste products in the blood.

• it increases the overall volume of blood in the body.

Lifestyle choices influence the structure and function of the cardiovascular system over time in which of the following ways?

• They can lead to changes such as arterial plaque buildup and altered heart function.

• They have no effect on the cardiovascular system.

• They only affect the respiratory system, not the cardiovascular system.

• They cause immediate and irreversible damage to the cardiovascular system.

Emotions such as stress, anxiety, or anger impact the digestive system primarily through which physiological mechanism?

• Activation of the autonomic nervous system

• Increase in bone density

• Improvement of vision

• Reduction in lung capacity