Question

question 4
a runner is participating in a marathon. as they run, their breathing rate increases, their heart pumps faster, and their muscles begin to feel fatigued. they also start to sweat to cool down their body.
which combination of body systems is primarily working together to help the runner complete the marathon?

• muscular, circulatory, respiratory, and integumentary systems
• muscular, nervous, and digestive systems
• muscular, endocrine, lymphatic, and circulatory systems
• muscular, immune, reproductive, and skeletal systems

question 5
during a particularly hot day, a kid comes and quickly runs their hand away. their heart starts to race, and they begin to sweat from the sudden shock.
which of the following is most accurate as to how the body systems work together to protect the person from harm? (select all that apply)
... (subsequent questions and options omitted as per ocr text extraction rules)

Explanation:

For the marathon question: The respiratory system increases oxygen intake, the circulatory system delivers oxygen and nutrients to muscles, the muscular system does the physical work of running, the nervous system coordinates movement and physiological responses, and the skeletal system provides structure and support for movement. The urinary system filters waste from muscle activity, and the integumentary system (sweating) regulates temperature.
For the hot stove question: The nervous system detects pain and triggers the reflex to pull the hand away, the muscular system moves the hand, the circulatory system increases heart rate due to stress, the integumentary system sweats to regulate stress-induced temperature, and the endocrine system releases stress hormones to trigger the fight-or-flight response.

Answer:

Marathon Question:

D. Nervous, Integumentary, Respiratory, and Skeletal Systems

Hot Stove Question (select all that apply):

• Nervous System: Detects the heat and triggers a reflex to pull the hand away
• Muscular System: Contracts muscles to quickly move the hand away from the stove
• Endocrine System: Releases adrenaline to increase heart rate and prepares the body for a "fight or flight" response
• Integumentary System: Produces sweat to regulate body temperature during the stress
• Circulatory System: Increases heart rate to circulate oxygen and nutrients during stress