Level 2 acute response to exercise

Which of the following is a common short-term response of the respiratory system to exercise?

• Decrease in heart rate
• Increase in breathing rate and depth
• Decrease in breathing rate and depth
• No change in breathing rate and depth

What occurs in muscles during acute exercise?

• No change in blood flow, energy production, and muscle contraction
• Increased blood flow, increased energy production, and increased muscle contraction
• Decreased blood flow, decreased energy production, and decreased muscle contraction
• Increased blood flow, decreased energy production, and decreased muscle contraction

What is the source of immediate energy for muscle contraction during short bursts of exercise?

• Glucose
• Lactic acid
• Water
• ATP

Answer explanation

ATP, or adenosine triphosphate, is like a tiny, supercharged battery inside your cells. It's the energy currency of life! When you eat food, your body breaks it down and extracts energy from it. This energy is then used to create ATP.

Think of ATP as a rechargeable battery that stores energy. When your body needs energy for things like moving, thinking, or even just staying alive, it taps into ATP. It releases a burst of energy by breaking off one of its phosphate groups, turning it into ADP (adenosine diphosphate).

So, ATP is like a power bank that fuels all the activities in your body, from the tiniest cell to the big movements you make every day!

What effect does acute exercise have on bone density?

• It has no effect on bone density

• It decreases bone density

• It increases bone density

• neutral

Which of the following is an acute effect of exercise on joints?

• Improved joint stability
• Reduced inflammation
• Increased flexibility

• Decreased range of motion

What gas is exchanged more efficiently in the lungs during acute exercise?

• helium (He)
• nitrogen (N2)
• carbon dioxide (CO2)
• oxygen (O2)

What occurs in muscles during acute exercise?

• They shrink

• They stay the same size

• They contract and generate force

Which type of muscle fibers are primarily used during high-intensity, short-duration activities?

• Type II muscle fibers (fast twitch)

• Type IV muscle fibers
• Type III muscle fibers
• Type I muscle fibers (slow twitch)

Which component of the skeletal system provides attachment points for muscles and allows for movement?

• cartilage
• ligaments
• tendons
• bones